The day she arrived, we chunked her in the pool and off she went. It didn't take 5 minutes to figure everything out and begin. We had been saving some dirt for about a week for her and it was getting bad. We have a 27' round above ground pool and she had it spotless in a few hours. This thing is saving us at least 6 hours a week of vacuuming !! We have been using her for about a month now and love her. If she ever breaks, I am getting another one immediately.