Don't worry about those Gnu binders, they work great. We used to be a Flow dealer, picked up Gnu binders a few years ago and put them in the demo program. The positive response we get from people who try the Mutants is very real. As a result of letting people ride both before they buy we stopped being able to sell Flows, we dropped Flow. We sell more Gnus every year than we ever sold Flows and are usually sold out by Feb. We never drank the Cinch punch, they haven't gotten any love from our product testing team.
This is just the response we get in our shop, other shops have different experiences.