I love how slippery they are. getting the angle correct is key to taking advantage of it's features & benefits.
I haven't tried the pro, but my favorite so far is the B-17 narrow for long rides. It felt good right away, and I think one of the reasons is because you slide forward and back to change your position slightly on a long ride (that's what she said). I'm in favor of slight upward tilting but that probably is not for everybody.