I have heard from a very reputable source that the evols are a great concept and actually a great shock if they can be dialed in correctly. However, the same source, who is a pro rider and shock builder and has worked extensively with fox has also warned that they are incredibly difficult to truly get dialed in. Fox had a representative travel with Natalie at every single race last year to fine tune the shocks. This persons advice was to consider other shock options until the air shock technology has been ironed out a little better for use in the general public. But then again, who knows. I'll probably be going with a more traditional spring over shock for now. Good luck.