I came back for this review after a week of use. First, it's worth the money. He does his job and does it well. Not many fancy features but cleans the dirt off the floor. I find money well spent. Secondly, after 2-3 weeks nothing interesting happens to him, I don't even need him. worry about it Keep calm and clean, that's the whole point. However, it would be better if TCL would update the algorithm in the future, but then again, you get what you pay for. In general I like it.