I have two of them, and have basically turned them into sports bras. I felt that they didn't give me any lift, and that they basically flattened me out. There is no molding to the cups at all, so depeding on how large you are on top (I'm a 36D), they may not give you any shape.
They are great for the back roll, yes. But you can find bras that have a wider band around the body that accomplish the same thing. (Olga's Christina t-shirt bra is AMAZING for this).
Just wanted to give you another opinion, particularly since they're so expensive.