The Good: Light, Nimble, No brake jack, Bottomless feel, Quiet, it just plows like a dirt bike.
The Bad: Trek does not sell The Frame Only
This bike rides just like its younger brother carbon version its amazing!!!!!! the combination of the Full Floater (allows the full rear linkage to move without sinking into the travel of the shock, when you come into corner's leaving your full travel for the brakes pumps ahead), with ABP Active Braking Pivot (rear linkage bearings are concentric with the axle of the wheel, it feels like the rear wheel wants to sink into the ground when you brake instead of the annoying brake jack). This bike its a machine that eats holes, rocks and roots for breakfast any day. I have my 2012 Session 8 build at 36 pounds. If your are thinking about it, do it. You will not be disappointed ask Aaron Gwin & Tracey Mosley.