Did you go somewhere to try it on? I went to VS over the holidays and tried on the one and only white bustier set they had in the store and didn't like it, felt like the bottom band was loose around my waist- looking for one with that smooth "molded" look but still with some embellishment/lace.
I'm having trouble finding something online and nervous to order one without trying it on because it does need to fit perfectly, but stores like VS and aerie don't seem to have a good variety, and I'm not really comfortable going into an "adult" store...but I may resort to that if I have to.