This is a cute, young bra. It would work wonderfully under tees and tanks, especially with its thin straps. I am however concerned about its quality and longevity. The band is very stretchy, as I'm immediately able to fasten it on the third set of hooks, and the fabric seems quite thin. Not something that will hold up well over time. But I suppose you get what you pay for as this bra was only $20.
This is a molded, lightly lined, plunge bra. The cups are actually fairly thin, for being a molded cup, but certainly do the job. The fabric used is VERY nicely slinky silky, and the straps are very thin (as opposed to just narrow, which they also are). The band seems pretty stretchy to me, but I also tend to need very firm 30 bands as I measure 27" snug.
I know plunge bras supposedly don't work on a lot of shallow ladies, but this seemed to work just fine for me; the only problem I had with it was that the gore wants to lay a bit crookedly on me, with one side higher than the other, likely due to my scoliosis. This might be correctable by narrowing the gore to bring the ends of the wires closer together.