We've used the PC, Cyclo, FLEX and Rupes bigfoot 21 and I personally love the Rupes the most. This one is going to be best, especially for a beginner looking for quick correction. PC is cheap but you'll pay in vibration, and Flex is awesome, but a bit more aggressive for a beginner. Cyclo is awesome for easy jobs, but overall the Rupes is the best bet, IMO.