(checked 2026-10-10)Small sample (532 ratings). The listing pools the W2S Omni, W2 PRO Omni and W2S, so the histogram is not W2S Omni only.
Trusted Reviews found its cleaning brilliant and its grip secure, with edge scrubbers for corners. But it was noisy, the spray blew away in a breeze, it won't fit small windows, and the tester didn't save time because they felt they had to watch it.
Top complaints
- Needs watching, saves little time
Trusted Reviews says it didn't save any time because the tester felt they had to watch it in case it got stuck or fell off. Amazon's summary for this pooled listing says it can get stuck.
- Won't fit small or hard-to-reach windows
Trusted Reviews couldn't use it on small top-opening windows (minimum pane is 30 x 40 cm) and found no safe way to place it on most first-floor exterior windows.
Source: Trusted Reviews - Noisy; spray blows away in wind
Trusted Reviews recorded 68 dB, found the cleaning solution didn't reach the glass in a slight breeze, and noted a short 1.2 m power cable.
Source: Trusted Reviews
What owners love
- Brilliant cleaning
Trusted Reviews says it removed dust, water marks and smears inside and out, and cleared most of a tomato-sauce smear, though sticker residue stayed.
Source: Trusted Reviews - Stayed firmly attached
On a first-floor exterior window it stayed firmly attached and didn't fall. The 5.2 kg station acts as an anchor, and Ecovacs claims it can stay attached for up to 30 minutes on low power.
Source: Trusted Reviews - Quick setup
Trusted Reviews says it took no longer than five minutes from box to window, and the app is optional.
Source: Trusted Reviews
- Your windows are smaller than about 30 x 40 cm (12 x 16 in)
- You want to clean outside upper-floor windows you can't reach
- Noise bothers you
- Large windows and patio doors
- Edges and corners (TruEdge scrubbers)
- Battery or mains power
Scores (tap for why)
What experts say
- Trusted Reviews: A brilliant robotic window cleaner for large windows (first reviewed 2026-06-02, UK RRP £529). Cons: unsuitable for small windows and for most exterior cleaning above the first floor.