Ordered on Sunday arrived Tuesday, that's pretty good. Charged it and threw it in. I couldn't figure out the logic of it. It ran diagonally across the pool. Vacuumed the hooper quite a bit, got stuck on the main drain once. It would come to the side of the hooper, run up the side a little bit, go back down, spin around go off in some other direction. After that it kept hitting the main drain but never got stuck again. When it got to the shallow area it ran width wise and covered the whole section in an orderly manner. I think the shape of the deep end threw it off a bit. It did run up the walls and cleaned the waterline. It seems like the pool was cleaner and there was stuff in the basket, which was easy to R+Replace, and cleaned out easily with the hose. I have to say this, after 25 years of vacuuming the old fashioned way, this was easier.