I have an 09 5.5.2. For comparison, I also have a Rocky Mountain ETSX, which is renowned for climbing. And I love the 5.5.2, climbing included. Yes, it is short in frame length, but you know that when you buy it. As for these rumours about them cracking… I trust what I am told here totally… Llandegla have sold loads of this bike, and have had precisely one crack. That was a size large and it was where the shock mounts. It mounts differently on the medium and large. You ride very low in the suspension. Compared to the ETSX, I was initially convinced I would be catching the pedals every 2 minutes, but actually it happens about once a ride. I ride Llandegla loads inc the moors, also Coed y Brenin, also the Clwyds, also Penmachno. I kind of thought “hmm, I need more steep rocks now” and without suddenly moving to the alps, that ain’t gonna happen to a huge extent. All I know is that I love riding this bike.