Very useful product. My only complaint is it will not cross thresholds larger than 3/16". This is very frustrating as my whole house is luxury vinyl flooring but my bedrooms all have thresholds. It's hard to find thresholds low enough for this product to cross. This problem could be solved very easy with the use of the app, map. Once your robot maps out the house you should be able to set it to be able to cross these thresholds as the robot has already been in the rooms, and put the map together but it won't because it's programmed not to cross anything larger than 3/16". Seems to me some simple programming along with a little user input and this problem could be solved. But for now I have to place it in the rooms with thresholds it won't cross, even though it has the map and knows it's been in those rooms already. Please look into this issue as it is the only holdback to this product that I can find. Thanks