This is my favorite running bra. I normally wear a 32D bra (or 34C if I can't find that) and this bra in a 32C fits like it was painted onto me.  There are 2 distinct breasts (rather than uni-boob) and there is NO jostling to the side or up/down.  Plus, for the first time, there are no "sausage rolls" of flesh out the back or under the arms!

The elastic underneath is very wide so it lays flat without rolling.  My only complaint (minus one rating star) is that the outer fabric is tighter than the inner liner, so the elastic band doesn't lay entirely flat ( it's getting pulled up into the bra a little bit).  As a seamstress I understand the difficulty in getting a liner and an outer to match 100% perfectly, so it's not a huge deal and doesn't make it less comfortable or effective.

My favorite part is that it goes on like a normal bra, so I don't have to dislocate my shoulders to yank it off over head.
My rib cage is quite small, but my shoulders aren't narrow, so once I get INTO a sports bra that fits, getting out of it overhead is practically impossible. The back hooks are a godsend.

The straps are padded nicely and totally smooth. The velcro attachments are fully hidden from skin contact and the edges are bound so there are no sharp edges to dig into the collar bones.  I have other bras like this, but the straps actually cause chafing over the boney areas after a few miles of running.