I have a B-17 that is breaking in nicely (approx. 700 miles on it). It is currently on my Surly Cross Check, but for the first 200 miles or so it was on my Kona Caldera. Very comfortable from the start. However, I ride mostly diffcult trails the average Joe would probably struggle a bit with. The B-17 was too wide for me to be confident about getting behind it on the steeps. If you ride technical trails I would not get the normal B-17, but opt for one of Brooks' narrower offerings. Hope this helps!