I have owned both the Blue Diamond, Aquabot Turbo T4 Remote Control and an Aquabot Viva .The Blue Diamond Remote was a great buy , cost me $1100 from Frontgate couple of years ago.seems like one of their Reps switched the pricers online for the regular and remote units, so I icked a Remote one up for the price of the regular unit.It is (was) a great machine. I sold it on Ebay after three seasons and got what i paid for it . I then Purchased an aquabot Turbo T4 , as I liked the specs of the water jets on the bottom of the machine .I used it for one season, while it works great , I missed my Blue Diamond , the PVA brushes were better for my vinyl lined pool, I liked the program button, being that I was able to keep it on the floor only and no walls .So I sold it to a friend and purchased an Aquabot Viva 2 weeks ago, great machine, same exact machine as the Blue Diamond Remote.In fact, Blue Diamond is made by the son of the owner of Aquabot, so the Viva is not a copy, it's actually the original .The Blue Diamond was rebadged under a new brand name, my guess to corner more of the market away from Maytronics , who makes the Dolphins.In fact the warranty registration card of the blue diamond gets sent to Aquaproducts who make the aquabot.I have also tried the Dolphin and was not pleased with it at all .The Blue diamond Pearl is the lower end machine , The Blue diamond Remote is the higher model .I like the remote control feature as it comes in handy with spot cleaning , either an Aquabot or a Blue Diamoond is the way to go .Get the one you can get for a btter price !!