Bought this to replace some VS strapless bras I've had for a few years and just aren't holding together. I love that there are no cheap plastic or metal details that touch my skin. The support was great - I wore it all day at a wedding, from 8am to 11:30pm no slippage at all.
Haven't tried it with the optional straps and I probably won't.
My only complaint is very minor - I had to go for a sister size for a larger band since my normal fit was way too tight.