Yeah, I did about 1 1/2 hrs. today and was uncomfortable about half way through. Aside from the hardness in general, there are two specific problems. First, there is extra pressure applied to the underside of my thigh, where it comes off the seat, and second, the seat doesn't go back far enough to accommodate my entire butt. I find myself sitting on the upward incline at the rear. If I move forward off of that, then I feel too close to the handlebar grips.