(checked 2026-10-10)Small sample (542 ratings). The listing also includes a W2 PRO variant, so the histogram may not be W3 Omni only.
Ecovacs' flagship washes its own pads and grips very securely. But Gizmodo got bad streaks on its first run and weak edge cleaning, and calls it worthwhile only if you have many large, hard-to-reach windows. It is big, heavy and costly to run.
Top complaints
- Streaks, especially on small panes
Gizmodo's first run left 'glaring, terrible streaks' (linked to an under-wet pad), and streaks still showed in corners of smaller panes; a dirty pad left a square mark where it parked. Amazon's summary says some owners report streaks.
- Weak edges and error stops
Gizmodo calls edge cleaning not great. Tapered exterior frames sometimes failed to trigger its sensors, causing an error stop, and once it cleaned only one quadrant and stopped. GadgetGuy had it get stuck outdoors and report slipping when its tether caught, and had to drive it to safety in the app. Amazon's summary says some owners report it slipping off.
- Bulky, costly to run, thin documentation
GadgetGuy says it is heavy and massive (2.1 kg robot, 10 kg station) and less neat to store than earlier models. Gizmodo lists solution at $25 per liter and pads at $32 a pair, and criticizes the lack of documentation. Amazon owners are divided on value and battery life.
What owners love
- Very secure suction
Gizmodo says it sticks to glass 'like a plastic-and-metal lamprey', with sensors that alert you to lost suction or slipping. GadgetGuy notes the heavy station acts as an anchor.
Source: Gizmodo review, GadgetGuy review - Washes its own pads
GadgetGuy rated the built-in pad washing excellent; Gizmodo timed it at about 1 to 1.5 minutes.
Source: GadgetGuy review, Gizmodo review - Quick on large windows
Gizmodo measured about 5 minutes (Thorough) or 2 minutes (Fast) for a 4 x 3.5 ft window. GadgetGuy says it cleans large windows faster and better than smaller robots, and Amazon owners call it a huge time saver.
- You have small windows (Gizmodo saw corner streaks on 24 x 22 in panes)
- You want tidy storage
- You don't want to pay for pads and solution
- Homes with many large windows
- Self-washing mop pads
- Long battery runs (about 130 minutes per Gizmodo)
Scores (tap for why)
What experts say
- Gizmodo: Genuinely useful (2026-04-05, $700), but only if you have a lot of large, hard-to-reach windows. Cons: a bad option for small windows, won't clean as well as a human, and lacking documentation.
- GadgetGuy: 8/10 (2026-09-24): the 'Rolls-Royce of window washers' for people with many large windows. Cons: it can't wash a window and its pad at the same time, it's bulky to store, and it's expensive.