I originally ordered the S version but read that several people on the forum felt like the "s" was "missing something".

At that point, I started to panic because I already had the S on order. Lo and behold, the place I ordered from didn't have the "s" in stock so they sent me a regular B67 instead. I have yet to use it on my bike but if you do a search on this forum you will see that several members recommend the regular mens B67 version over the "s".