I've got the PI suit in size small. I'm 5'8, 145lbs and the fit is snug but comfortable. I've got a few (2-3) wrinkles right at the shoulder bend as Heath describes, which as others have said is likely because of the material needed to support flexibility for swimming and running. The suit in general is pretty sweet and the material unique. I don't have any aero testing or outdoor rides yet to make a determination on whether or not it is faster for me.

Chris