I've always had a sensitive scalp, so I've tried pretty much everything over the years trying to find something that worked for me. Crew products are pretty good, but I'm allergic to them. Same with Aveda. A couple years ago I started using Ovation (after being inundated with their ads on Sirius radio and finally fell for it) and was actually surprised. It's one of the few shampoos I've been able to use that actually helps my scalp.