Well, I've currently got a Delia's bathing-suit sitting in my bedroom waiting to be returned. It just doesn't fit a woman's shape. The top is fine, but the buttom just doesn't cover my butt at all. I don't know if my butt is just too big for it or if it's just not cut high enough- there was some major crackage going on. Just for reference, here's the suit I tried:
Obviously, not the same shape as the one you are looking at but I thought I would give you my two cents anyway. One thing I would suggest, is making sure that the suit you are buying is from a reputable suit company. The black suit doesn't have a company name attached to it so I would be a little wary, simply because I can't imagine Delias itself being of okay quality. Some of thier suits are by Roxy or O'Neil or other actual suit companies. If you can return it without a prob, then I say try it...for that price it's worth a try.
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"But I want you to remember, I intend this breast satirically." Susan from Coupling