I probably have over 150 hours on mine, and they are just fine. The thing I didn't like is that I didn't get the upper shock flush w/ the mounts on the inside, it was a little loose, due to a few cold ones. Plus, the bushing was falling out due to not having any rubber around it anymore. Other than that, that's the only complaint I have, which is nothing as once it is installed, the bushing can't go anywhere. I did have to set the preload all the way down to get remotely the same height. But for the 120 I paid I think it was, they are definately worth the upgrade. A big difference over stock. I have left it at the stock settings they came, they were brand new take offs, and other than the preload initial adjustment, I haven't adjusted anything else, unlike on the 450's when I'd adjust it for race to race. Granted, I am not jumping this over triples or anything, but I have hit quite a few nice jumps, and I have only bottomed these out once, when I hit a 60ft table, but I was trying to clear the small step up after it as well, and I landed front tires first...by a lot. I say they are a great investment for someone that isn't going out of their way to race or anything. I had the whole scramble season on them, and they have held up great. Hope this helps.