They are a very high quality shock,much better made than the original stuff. Better be for the original asking price of like $800 + or so. The shock will last longer as it is better made. The damping controls work very well, make a big difference. I bought mine as i just trail ride and needed a better riding rear shock. It was going to cost me about $250 for a oil change and new spring for the original shock and i found the Ohlins for $320. So it was no contest.
I still need to get a stiffer spring for mine as i am over the preload maximum,but i weigh 205lbs, so it may be OK for a lighter rider. It works GOOD after i set it up. The original shock was terrible on the choppy braking bumps and fine on the jumps. The Ohlins just smoothly floats through everything.
The main thing with suspension is that you need to make it work for you by adjusting the damping and preload.