Buying an irobot was one of the worst consumer decisions I ever made. It can only work with extreme supervision otherwise it mounts and scratches lamp bases, gets tangled in cords or assaults plants. What's the point of having it if you have to make the whole apartment inert before letting it loose. Worse still it never seemed to learn and would often finish its job leaving huge parts of the floor untouched.

And even worse, just past the warranty period the side brush which rotates to flick dirt into the path of the irobot broke.

I guess I am part of the 20% even though the irobot sits in my cellar doing nothing.

We bought a dyson fluffy (battery powered) recently and that's a much better choice.