Y'know, I noticed how firm the Turbomatic was when I first sat on it, coming from a Jett, for sure. But there really wasn't an adjustment or break-in period at all. My first ride on it was 56 miles and I had no sitbone soreness. I haven't done a long ride on it yet (how this summer's gone for me ) but I've got enough miles on it that I'm sure when I do it won't be an issue.