Just bought the Zodiac MX-8, mainly due to the good reviews on Amazon and the $100 rebate. Works fine in my 15,000 gallon pool but I do have a 2Hp pump (supplies pool and attached spa) without a dedicated suction line (use the skimmer and have to close off my main drain valve and partially close the second skimmer to get plenty of suction). Picks up everything that I need it to and is fairly quick