My breasts are full on the bottom and fill the cups perfectly. There is no wrinkling on the top, either. However, the straps are too wide for my small frame and they often dig into my armpit area. The band is also a little too large for me. Either it stretched out or I got used to having a band size that wasn't way too large for me. (Thanks VS!) Anyway, this is a considerable step up from all of my previous bras.
This bra is good; there is some very minor gaping at the top of the cup. The material is not the most comfortable but once it is on awhile I forget about it. Overall a pretty good bra, especially for the ebay price.