i put lots of miles on a prototype last year on my stumpy. i have no association with vorsprung, steve just offered to let me try it after a long chat about what i wish my shock felt like. huge improvement in initial stroke, its super supple off the top, like a coil, so far better traction. much improved mid-stoke support, so the bike was so much zippier in undulating terrain, pumping, cornering, etc. i was running a lot of preload (10-15% sag) and a firm tune before this, to try to gain mid-stoke support, so i was very harsh and traction was very poor. with the can i can run 20% sag and it feels like a totally different bike. its a huge upgrade, highly recommended. in fact, i can't think of a more dramatic upgrade i've made to the bike, including fancy forks.