The idea is great, but the implementation not so.
We have installed the sensor 45cm away from some low voltage lighting on the shelf above, but it still spontaneously flushes due the the electrical disturbance when the light is switched on it seems.
We partly solved it by placing a sheet of tin foil above the flush sensor, which is going to be a pain when we need to change the batteries. Hasn't entirely solved the issue as we still hear an occasional flush if the light has been on for more than 5 minutes, but we can probably live with it.
The mechanism to flush the WC with your hand seems to work fine though.
I haven't used it as a hand-held yet, not the attachments, other than mop head, but it is lightweight, easy to manoeuvre and does a good job removing light soiling on tiled flooring. Especially good feature of the mop is it leaves the floor almost dry immediately and has a very long flex, so you can do all around a medium sized room without unplugging it.
Having only 2 mop cloths is a negative, and I would not use it on a very dirty floor, as unlike a "wet" mop, it would just push the dirty cloth around.
I've only used it a couple of times, but so far I like it better than expected.