The Good: This is the best pedaling DH bike there is. The bike corners like it's on rails and and jumps and pumps off of small features like no other DH bike I have ridden.
The Bad: I think the RC4 is poor match for the progressive linkage design of the DHR. Although the bike was smooth overall, I had an issue with the rear shock spiking when going over small hits at higher speeds. I also wasn't too fond of the stiff feeling the shock provided when going through "nastier" rock gardens. I really would have liked to ride the frame with a Double Barrel or Vivid Air to see how this would have changed, but seeing as the DHR is specced with an RC4 I think what I said above is fair to point out.
Overall, the DHR is a great DH bike, but after my experience with this frame I will never buy another Turner. Turner wouldn't return calls or emails and that is not okay in my book. The bike is not a plow bike. If you ride smoother trails with lots of jumps and berms you'd be hard pressed to find a better performing bike. If you like to plow through rocks, look elsewhere.
Turner's quality straight up sucks. I really can't word that any nicer. My ISCG tabs were out of spec, the bb threads needed to be chased, the head tube needed to be reamed, and there was burn through in the bb and the headset. The frame I got should not have made it through a quality control check. The best part was Turner's response was to file down a chain guide. The legendary Turner customer service was nonexistent in my experience.