VERY flattering, and made of a stretchier material so it can fit to your body.  Since the cut of the outfit is shaped in an hourglass, it helps a little in the tummy to me.  Only complaint I have is in the necklace part, the way it's attatched if you're broad-shouldered like I am the necklace can be a bit too chokey.  Overall very sexy costume, can not wait to wear it.  The picture does not show it, but the slash-lines all over the costume are zigzag seams kind of. (if you're wondering, I at first wondered if they were zippers or just stripes), and do not look gaudy or affect the comfort.  I am 5'6, 140 pounds and got a medium, could probably have done a large for added comfort.  Lengthwise it feels like I'm a bit too tall for it, as it's a bit tight, but size-wise it does not feel that way.