I got a Dolphin Advantage last Christmas. I live in San Antonio and never "close" my pool. I dropped it into the pool on Christmas day and it went to work right away, covering all areas of the bottom, climbing the walls and scrubbing the tile. My pool is 10.000 gal, basically oval, with stairs and a large swimout. The Dolphin even cleaned the two lower stairs and the swimout. I have a cartridge filter and the cloth bag that came with the Dolphin definately has improved water clarity. A few weeks ago I use a few pummace tile stones on some problem areas of my tile. As you might know, those things can leave a pretty good mess in the bottom of the pool. I just dropped the Dolphin in and a few hours later all the gritty mess was picked up.

So far I am 100% happy with it and I've used it about once per week ever since Late December.

DerrikM