Previously tested a cordless vacuum cleaner, but not a robot, from Philips. It's in my reviews. Here it is just - money down the drain, compared to these robots. It seems to me that any wireless vacuum cleaners will be a waste of money, because this robot has such convenient functionality, in comparison with them, that the meaning of the former is completely lost. Of course, this is provided that the cleaning starts daily. But it's worth it - the feeling of a clean floor with bare feet!