i rode the Turbo for years in the 80s, and since coming back to cycling have logged a good number of miles on a B-17 and Professional w/copper. i find the professional to be slightly more comfortable than the B-17, but either one is just about the best saddle i've ever been on. firm but forgiving, support across the sit-span, not just in one place. you never get the feeling of sitting on a post or rail, just firm support.