The Winbot W2 Pro Omni climbs your windows and cleans them while you do something else. Its portable power station means you don't need an outlet nearby, inside or out.
What it does well
Spotless results: reviewers saw filthy glass come clean in a single pass.
Portable: the battery station runs about 100 minutes and doubles as a carry case.
Safety first: a 100 kg-rated tether and an alarm if suction drops.
The honest catch
It can't reach the very corners of a pane, it won't fit very small panes, and the fan is loud.
Verdict
Worth it if you have lots of glass or hard-to-reach windows and hate cleaning them. Check the sale price; it's often well below list.