I LOVE the Venice bottoms. As expected, they are slightly smaller than a "normal medium" and fit closer to a small than a typical medium in other bottoms. Nonetheless, I have a small bum and believe these hug all the right places; they do not feel like they will be going anywhere unwittingly as they are snug.
I also bought the fitted top in a medium, but had to exchange it for a large as I experienced under-boob. My cleavage looked bomb, but I have a feeling my breasts would wander in the event...