I'd strongly agree with the last sentence of the second post. My B17 was fairly comfortable on rides up to about 20 miles, but started to get uncomfortable at the 30 mile point. On my first 55 mile ride, my butt hurt so bad by the 40 mile point I had to dismount every three miles on the last 15 to give my butt a rest. Overall I rode it about 400 miles before I decided it just wasn't for me. I put a cheapo Diamondback saddle on next and that seems to have done the trick.
Keith