Well my Dolphin Primal X3 arrived a few hours ago. Glad to have it as the Pearl has been dead a while and the pool had lots of crap in it. Threw it in the pool and turned it on and it went right to work. Its been running for about 90 minutes and has just about cleaned everything up, no clue how long it goes for in a complete cycle. If anyone cares to watch it do its thing I took my iPhone and videoed it for about four minutes: