When I first got this bra, it was way too big for me, but now that my measurements have increased a bit, I really like it. It seems to want a little more upper fullness or root height than I have (the same gaping-at-the-strap problem that I always have with plunges), or perhaps it's just still slightly too large, but it's comfortable enough nonetheless. The only thing that bothers me at all about it is the fact that I have to tighten the straps more than I probably should, and they dig in a little. The straps are pretty thin; if they were wider maybe this wouldn't happen as much.
Edit: I'm now measuring 30F/FF and this bra fits perfectly. It definitely runs large for a 28:6, or maybe it's just stretched out.
This cup is constructed of a sheer-red lace with subtle little dots on it. I've tried it with a few thin t-shirts, and it doesn't seem to show through them. There is a large lace flower on the gore, and the straps are fully adjustable, which is great for people with long torsos or low-set breasts.
I think the cup design would be ideal for someone who has a good amount of immediate projection, narrow roots, and some upper fullness.