I have a rim drive trainer and I like it for the most part (as much as anyone can like a trainer) except that oftentimes I just can't dial in enough resistance without causing wheel slippage. It does promote really good spin technique however. Also, you need to be careful about leaving the rollers in contact (or cranking down their pressure to prevent slippage) with the rim as the rubber in the rollers will deform and for the first few minutes, you'll feel like you're going to shake the bike off the trainer. The upside is that you don't wear out your tyres but their are some eccentricities you'll have to put up with. My next trainer will probably not be a rim drive... assuming I even want to buy a new torture device.