The Good: Super solid and stiff, frame takes the edge out of rough terrain, not much weight penalty for a steel frame, well thought out geometry.
The Bad: The rear drop outs are a nightmare to use, the older frames have no ISCG mounts.Overall Review: This is definitely an amazing bike. I have mine built up with heavy duty all mountain parts and it's still weighing in at a nice 27 pounds. I noticed that over watermelon sized rocks, the frame really takes the edge off all the hits, especially compared to my old aluminum frame. It's still not as smooth as a fully (obviously), but it's definitely not half as bad as you might expect. My only complaint with it is the rear dropout system, mainly if you run gears. To remove the back wheel, you need to remove two little "chips", the derailleur, and the brake caliper. That being said though, I haven't needed to remove the back wheel ever since I went tubeless. Besides that, it's an amazing bike. If you've never ridden a steel bike before, you really owe it to yourself to try one!