I put a B-17 standard on my Marin Sausalito hybrid at the beginning of the season (1500 miles ago) and I absolutely love it. It has broken in beautifully and couldn't imagine a better saddle.

I recently converted a mid-90's Gary Fisher Marlin mountain bike to a tourer, and chose a B-17S (women's model). It feels great, and I think the extra width is a good thing for my sitbones. I don't think the shorter length will make a difference for me. I'm looking forward to many happy miles on it!