I have a mountain addiction on an 06 rev. I love the suspension. They are the best boon docking suspension ever. It makes the sled feel 100 pounds lighter than anything out there, and I've compared it to xp's. My wife loves the sled. It makes it easier for her to throw around. I can pull the sled over on it's side on flat concrete with one hand. Try that with yours.
I have broken limiters and other stuff but Tim had some new and improved parts. Since I changed them I haven't had any trouble. I had a bearing go out in one of the axle wheels but it had 3100 miles on it. I should have changed it sooner.
The only problem I can see with the suspension iis it has some rebound issues. If you jump off something you catch more air on the second bounce. They have a rebound adjustment on the works shocks. If you slow the rebound down it gets harsher on the trail. I need to get stiffer springs and have them valved stiffer.
You won't be sorry if you get one. They are not a huge weight loss but they are worth it to me. They are more like 52 pounds.