I just bought one last week, only had it on one time for like 30mins, Ive been busy with work and not able to ride much, I can tell ya more in a few days. But my initial thought is Im happy with it, I didnt notice the little hump section on the back BEFORE I bought it, but it does serve a purpose, in that it keeps your head from being thrown back, I dont really like the hump much appearance wise but overall its a pretty sweet and quality jacket. if you get one, check out
www.tonker.com and use the coupon code "joe rocket" and youll save about $50 on it, I paid $352 shipped