The fit & coverage around the breasts is spot on. It's comfy & gives the illusion that I'm not wearing a bra all the while providing the right amount of security I needed in my new dress.
I'm normally a 32B (I'm 5'8 and 130 lbs). Based on the reviews, I ordered a 34B and it's a perfect fit! It was perfect for the dress I bought it for and gives the amount of cleavage and lift I was looking for.
Love it for a deep V but if you're trying to convert to a halter, it pushes the cleavage part out leaving a gap between your boob and bra if that makes sense... The top also flops out if you're trying to use it as a strapless unless your top is tight. Worked for my purposes, but I wouldn't count on this being an all-in-one.