I'm average sized with a fairly large bust, so I bought this in the size I normally wear and found it easily several INCHES too small - couldn't even get the clasps near each other!  When I recruited my fiance into helping me smush into the thing, it was tight, but not unbearable.  This is my first torselette bra, so I'm not sure if they're all meant to be this snug, but it has a nicely shaping cut which suits my figure and supports what it needs to.  No bulges, no weirdness underneath clothing.  Honestly, if it were easier to get into, I'd probably wear it more often.

As an every day item, I think I'd pass. But if you're looking for something to wear for a formal occasion of some kind and don't expect to wear it more than a few hours, it's a go.