The store doesn't look like much when you walk in, but it's because most of their bras are stored in boxes instead of out on display. You'll probably have to ask at the counter to even get started. The lady running the place was pretty terse and seemed annoyed that I was interrupting her bookkeeping, but she helped me when I asked for it. She wasn't very instructive, so I was glad I had read about the "scoop and swoop" technique before I went there (PS you should look that up if you've never heard of it).
There appeared to be a good selection of bras for larger women. Unfortunately there wasn't much selection in "smaller band but larger cup" sizes, just 0 or 1 bra per size. I was kind of surprised by that considering how many "skinny but augmented" dancer types we have here in Vegas (although I'm not one). I need somewhere in the ballpark of a 30DD or 30E, and Bra Boutique didn't have anything that fit. I ended up going to Dillards a few miles away at Meadows mall, where I found better selection, better lighting, and nicer staff.