I really like the idea of a 12mm polisher. More versatile than the larger throws, yet still a larger throw then your standard 8mm non-gear driven DA. I thought the Rupes Duetto(12mm orbit) was under-powered, so I wanted to give the WS12 a shot because it has a larger motor. I really like the body/ergonomics of the WS12, although, I like the Duetto`s even more. The WS12 spins up to 4800 OPM`s at MAX speed, which I think is a tad too little, BUT, it kept spinning when significant pressure was applied! Better torque than the Duetto! The WS12, when paired with a MF cutting pad and quality compound corrects a lot better than most people think! Love it!! The WS12 is very smooth. I`ve been an avid Flex 3401 user, but that might be changing with the WS12. After polishing a whole car with the 3401, I`m dead tired. The WS12 takes a lot less energy. All in all, I`m diggin` this polisher. If Rupes comes out with an MKII Duetto, I`ll be on it!!!.......