I get a a great fit in this. The band is a perfect 2-finger tightness and the cups are about perfect. I do sometimes get slight overflow near the gore and a bit of empty space near the straps, but that seems to be because of my soft breasts. I have that problem in all plunge styles.
I would suggest sizing up in the cup; I usually wear a 32E and this is an F. Also the straps are fairly wideset. Not a big problem for me, though I do get a bit of rubbing after a few hours where the strap meets the cup.