Roborock Qrevo Curv 2 Flow review: Roller premiere at Roborock!

Design and workmanship

Visually, the Curv 2 Flow follows the design of other Curv models. It features a glossy white casing, clean lines, and the characteristic curved base station that gives the "Curv" series its name. At first glance, everything seems familiar, but on closer inspection, it becomes clear that the new technology demands its own space.

With a height of 11,9 cm, this robot vacuum is one of the taller models on the market. The LiDAR tower and complex roller mechanism require space, which is then lacking elsewhere. This became very apparent in my home, as the Curv 2 Flow just barely fits under my IKEA Besta. It's completely blocked by the LiDAR tower.

Models like that Saros 10R or Saros 10 With their shallower profile of 7,98 cm, these low-profile pieces have a clear advantage and fit under almost all taller furniture. Therefore, anyone who owns many low sideboards or sofas should measure carefully before buying, as even a centimeter can make a difference.

 The workmanship and material quality, on the other hand, are at the usual high Roborock level. The gaps are consistent, nothing creaks or feels flimsy, and the roller unit itself sits securely in the housing. Despite the new technology, the system feels well-engineered, even if a retractable laser turret would have been the icing on the cake.

The base station: Large, but well-designed

The all-in-one station houses a 4-liter fresh water tank and a slightly smaller 3-liter dirty water tank, a 2,5-liter dust bag, and the cleaning and drying unit for the roller. Roborock has opted not to include an automatic detergent dispenser. Cleaning fluid must therefore be added manually to the fresh water tank. Such a feature would certainly have been a welcome addition to a roller mopping system.

With its dimensions of 45 x 45 x 45 cm, the station is also generously sized and a few centimeters wider than, for example, the stations in the Saros 10 series. Accordingly, it requires sufficient space, both in width and depth. Those planning for a narrow niche should take measurements beforehand.

The base tray of the station is removable and can be easily cleaned under the tap. Should any spills occur, the interior of the station is easily accessible through the generous opening. There are hardly any hidden corners where dirt can accumulate.

Less elegant, however, is the lack of a cable management system on the back. Depending on where the device is placed, the power cable hangs down visibly, detracting somewhat from the otherwise tidy appearance. A simple guide or clip would have sufficed to make the design look more harmonious.

The new roller wiping system in detail

Roborock has been considered one of the driving forces of innovation in the robotic vacuum cleaner market for years. Vibrating mop plates, extendable mopping elements, automatic mop cleaning in the station – many developments were either initiated or significantly advanced by Roborock.

This makes the new roller technology in the Roborock Curv 2 Flow all the more interesting, because here, the manufacturer was not the first. Other providers had already included rotating cleaning rollers in their product range earlier. The same can be said for mops, where Roborock took a bit longer to develop this technology.

How does the new roller wiping system work?

The functionality of the roller system is similar to what Roborock already used in its F25 Ultra Wet Vacuum Cleaner The concept has been implemented, albeit in a smaller format and without features like hot steam. The fibrous roller is continuously moistened with fresh water via eight nozzles.

Unlike mop systems, where water is only applied at the beginning, this system continuously replenishes the water throughout the cleaning process. This ensures the roller remains evenly moist as it rotates across the floor with approximately 1,5 kg of pressure.

Directly behind the roller is a scraper edge. As the roller rotates, the collected dirty water is immediately removed. The dirt and scraped-off water end up in a separate 80 ml dirty water tank inside the robot.

This tank is located on the back of the device and can be removed for cleaning or maintenance. It is only automatically emptied and the roller cleaned when the Curv 2 Flow returns to its station.

Despite its roller, it can treat both hard floors and carpets in a single pass. On carpets, it automatically raises its roller by 15 mm and extends a protective barrier to prevent moisture from reaching the carpet.

Baseboards are also no problem, as the roller sits on a carriage that extends it a few centimeters laterally out of the housing. Roborock calls this the "Edge Adaptive Function".

Where the system scores points and where it falls short

In practical testing, the roller system showed clear strengths, but also revealed typical limitations of this design.

The Curv 2 Flow's greatest strength lies in its ability to handle fresh spills and stains. Liquids aren't spread around, but actually absorbed. In our tests, mayonnaise, ketchup, coffee grounds, and spilled milk disappeared completely after just one pass. Here, the roller performs noticeably more like a wet cleaner than a traditional mopping robot with a mop, which usually just smears liquids on the first pass.

However, this advantage diminishes when dealing with dried-on stains. The Curv 2 Flow doesn't remove stubborn residue any better than devices with traditional vibrating mop pads or rotating mops. Multiple passes are still the norm, and even then, visible rings often remain. No robot vacuum has yet been able to compete with the intensive scrubbing done manually.

With a width of approximately 27 cm, the roller covers a considerable area. The extendable carriage helps to clean along baseboards and furniture edges. It doesn't get quite as close to the wall as systems with an actively extending mop head (e.g., the...). Saros 10RAlthough the Curv 2 Flow doesn't come with it, the edge cleaning is still convincing overall.

A practical advantage over many mop systems becomes apparent during longer cleaning cycles. Thanks to the continuous supply of fresh water, the roller remains moist for longer, meaning it needs to return to the water station less frequently. This also makes it faster overall in terms of cleaning time, saving several minutes.

However, the mopping pattern reveals that the wetting is not perfectly even across the entire width of the roller. Slightly drier lines remain visible in some areas, indicating that certain sections of the roller between the nozzles receive less water. In everyday use, this is usually only noticeable on smooth or dark floors, but it shows that the water distribution is not yet perfectly calibrated.

Due to its design, the roller is located behind the main brush. As a result, even if the brush unit is slightly raised, collected liquids can occasionally land on the brush tips or drive wheels. This isn't a problem specific to the Curv 2 Flow, but affects most robot vacuums and mops with a rear-mounted mopping system. Naturally, damp dirt at the front is somewhat more difficult to remove than dry dust, which is why the mopping system is almost always located behind the main brush.

The carpet protection works very well. The sensors react quickly, allowing the robot to lift the roller early and activate the drip protection. Even high-pile carpets remained completely dry during testing, which is not always the case with traditional mop systems in the same scenario.

For maintenance, the roller can be easily removed and rinsed under running water. In our tests, hair hardly got caught in the roller, which can be a more common problem with rotating mops. Thanks to automatic cleaning and drying, there were no unpleasant odors. Unlike traditional mops, however, this roller should not be put in the washing machine. This is a slight drawback in terms of maximum hygiene.

Suction power in the test

On tiles and parquet flooring, the Curv 2 Flow effortlessly picks up even coarse dirt such as rice, breadcrumbs, or cat litter. A major advantage here is the two side brushes instead of just one, which direct the dirt precisely towards the main brush. The main brush itself is a DuoDivide brush, which Roborock has been using in most of its current models for some time now.

It consists of two separate elements, which significantly reduces hair tangling. This was also confirmed by our multi-week practical test. Not once did we have to fish hair out of the brush.

On carpet, it becomes clear that high Pascal values, in this case 20.000 Pascals, don't automatically guarantee top performance. The Qrevo Curv 2 Flow left behind a few crumbs. This was particularly noticeable on carpets with a deep pile, which are generally difficult to reach. However, on regular carpets, the Curv 2 Flow performs just as well as more expensive models.

Despite the automatic emptying at the charging station, Roborock has generously sized the removable dustbin at 324 ml. Anyone with shedding pets with a lot of fur will appreciate this!

The Curv 2 Flow also remains within acceptable acoustic limits. In standard mode, it operates pleasantly quietly and doesn't significantly disturb conversations or television viewing. At maximum suction power, it becomes noticeably louder, but still operates within the typical range for modern robotic vacuum cleaners.

Navigation and obstacle detection

For navigation and obstacle detection, the Qrevo Curv 2 Flow relies on the classic LiDAR tower and not on the camera-based StarSight system that Roborock introduced last year with the Saros 10R and which is continued in the new generation 20 with the current Saros 2.0.

The LiDAR tower operates independently of lighting conditions and delivers highly precise room mapping. A clean, logically structured map is available after the first mapping run. Rooms are correctly separated, floor plans are realistically displayed, and furniture is reliably identified.

In everyday use, the Curv 2 Flow moves through the apartment in a very structured manner. It follows clean paths and avoids unnecessary changes of direction. This demonstrates the experience that Roborock has gained over the years with LiDAR systems, even though other manufacturers are now noticeably catching up and knocking on Roborock's door.

The obstacle detection system also incorporates AI-powered object recognition. Larger objects like shoes, bowls, or clothes lying around are generally detected and avoided. However, if there are many small items lying around, it's best to pick them up before starting the cleaning process. In particular, the robot vacuum didn't always react reliably to flat, white cables during testing and often ran over them without any success.

The Qrevo Curv 2 Flow can overcome steps and door thresholds of up to about two centimeters. However, it does not offer active chassis lifting like some flagship models.

App, AI functions and operation

On the software side, the Roborock Qrevo Curv 2 Flow offers the familiar Roborock suite. Anyone who has used a previous Roborock model will find the Roborock app (Android and iOS) immediately intuitive. Setup is quick, mapping is precise, and multi-story mapping is possible. Rooms can be individually named, combined, or assigned different cleaning parameters.

Suction power, water level, cleaning intensity, and number of passes can be adjusted room by room. With the roller system in particular, it's worth manually increasing the water flow, as the vacuum cleaner tends to conserve water otherwise. Of course, no-go zones, virtual walls, schedules, and targeted zone cleaning are also included.

 AI features like automatic dirt detection and raising the side brushes when exposed to liquids run discreetly in the background. This is complemented by extras such as a live video function and pet mode.

Battery and base station in everyday use

The Qrevo Curv 2 Flow uses a 5.200 mAh battery and achieves runtimes of around 140 to 150 minutes in practical testing. For medium-sized apartments, approximately 80 to 90 m², this is easily sufficient for a complete cleaning cycle. For larger areas over about 120 square meters, the robot automatically takes a charging break and then resumes cleaning.

After the cycle, the docking station performs maintenance automatically. Emptying the dust container is briefly audible but only lasts a few seconds. The subsequent roller cleaning takes a few minutes before drying begins. This runs for approximately three hours at a low speed and remains pleasantly quiet in the background.

Apart from refilling the water tanks and occasionally changing the dust bag, the system operates largely autonomously, keeping maintenance costs pleasantly low.