This automatic smart robot has been a sweet deal for our family. Our favorite places to use it are in bedrooms and bathrooms. I'm going to run it in the kitchen when I'm done writing this review! When the light turns blue, it's done charging. I just stick it in the room, hit the button, and shut the door. Easy-peasy. Our kids think it's more fun to pick up their toys and clothes if they know that we'll run the robot vacuum when they are done. So simple. I did let it charge overnight when we first got it.....the instructions didn't say to do that. I just wanted to make sure that the robot vacuum was fully charged the first time.