I definitely expected this to fit and function better.  I used the Enell website to enter my measurements (34 rib/38 bust) and it suggested a size 2.  I ordered a 1 just to make sure there was a firm hold during my runs.  Well, I should have ordered a 0 because this thing is useless.  There is some extra room in the bust just because the shoulders are too long and roomy for my frame.  I wear a 34DD bra and have a somewhat small frame, but am also athletic.  This bra seems to be made for people that are "apple" shaped and/or larger across the back and shoulders, regardless of actually cup size.  A 0 might be awesome for me, but I don't know because I don't want to shell out another $70.  My advice is definitely to try these on in person - and don't think a dry run will give you a clear picture, since you have to sweat and move in this thing before it truly "settles" into place.