Here is a link to a review of my Aquabot Viva from a couple of years ago.

http://www.poolforum.com/pf2/showthr...w-Aquabot-Viva

This unit is quick and thorough. It has worked flawlessly the past 3 seasons. Even though I dread cleaning out the bag, it only takes about 5 minutes. There are 2 cons to this cleaner as I see it. First, it's not cheap. Second, it's not good for gross cleanups. If you have a ton of leaves on the pool bottom during initial opening it will clog the bag in a bout 2 minutes. It's strength is in it's ability to filter everything , from leaves to dead algae to sand to dog hair. It will clean my whole pool in about 2 hours. I would definitely buy it again.

Tom