I am in the process of breaking in a Brooks Pro, I have a B-17 that I have had for a while. The B-17 really got nicely broke in in a few hundred miles, and just gets nicer. The pro on the other hand after a few hundred miles, is still brick-like. It is not miserable but it ain't the B-17 either. What I cannot understand is why Brooks claims the leather is the same for both, but the Pros are so much harder and take so much longer to break in? Is it punishment for the old time racer wanta-bes who used to get the pro when they really should have gotten the B-17??