Avids rock! Being in the Houston area with the company local here we see the team out racing here as well as the big major races. Drake, Atomic Ron, and several other big racers are using them now and yeah, at a $1 a bearing for non ceramics you can buy them by the sleeve and replace them a lot! Having fresh bearings can definitely solve things when you are not sure what is going on with engine tunes and lap times. I have never had an issue with any of them being less than what was advertised and delivered. Definitely a good bearing to choose!
I have bought alot of there bearings in the past and there just as good as any other brand. The price does kinda mislead you to think that they are cheap, but they are just as good as any other bearings I have tried.