While not a 29er, I recently bought a Trek 6000 that came with the Dart 3, 100mm. So far I haven't had any problems with it, but here in Michigan the trails are just starting to defrost so it hasn't had a good workout yet. The only issues I really have with it are that it's to hit the lockout bypass pressure and the spring rate feels soft to me. There is a "firm" coil available that I plan to purchase as soon as I have the extra money which should address the spring rate problem. I tip the scales around 270 for reference.Hope this helps.