I tried this first in my usual 32C size but the band had pretty much zero stretch and I could barely get it on. I exchanged it for 34B which is a bit better, but it does ride down after a while and the cups squish really tight making a slightly weird profile. And I am a shallow-cup girl.
This may be my favorite strapless bra. A rubberized strip runs along the top and bottom of the band so it doesn't shift when wearing. No matter how much you jump, skip, or bounce, this thing isn't gonna budge. It comes with removable straps and I suggest going without; they're cheap and just get in the way. There's very little stretch due to the lace overlay. The only flaws are that after a while it can start to itch; it leaves noticeable grooves when removed; and under some shirts (namely cotton) the lace catches the material, creating a roll or shelf effect. I just adjust it and move on. But for the right clothes, this is a godsend.