I dread buying and wearing strapless bras. They usually either slip down or smoosh my chest into non-existence. This one fits, stays put, and is flattering.
I will use this bra for when I need the criss-cross back, but do not plan on using it solely as a strapless. I am a 34D/34DD and found that the girls were not lifted and supported at all. Using it as a strapless made me feel very self conscious.
Strapless bras can be hard to find, and although this one is pricey, it's comfortable, and a lighter nude so it easily blends in under thin or sheer fabrics.
I say it's the best for me, since fit is so individual. I normally wear a 34B, but in this strapless I took a 32D!. I wanted it to fit snug, so it could stretch out a bit. The 34B was just too big with a gap at top of cups. So it works and stays up! Pricey, but it's true…if you can find a strapless that fits you well, it's worth the price. I've worn it all day with no problem. As I found, get help for a correct fit.