Background:  I perform in a community theatre and wear a shaper for all my performances.  This shaper is sturdy yet moveable.  I feel that it is breathable and it does have a cotton overlay in the crotch (which is something I appreciate).
Pro: This was WAY stretchier than I thought it was going to be.  As someone who is 5'3 and pushing about 190 lbs, I was afraid it wasn't going to fit around my hips and stomach.  It does take maneuvering like most shapers do but I think it is great and I didn't have any problems getting the clasps to close as long as I hooked it from the bottom and worked up.
Con: the "boning" does hit right in the middle of my ribs and one side does tend to dig a little.  I also have a fear of the clasps showing through the clothing I'm wearing so you may want to consider a piece over it, like a slip or another shaper if you're going to wear another one.