For sizing I agree with other reviews; I'm 5'7", 145lbs with an athletic build (i.e. 30" waist, cyclist-built butt and quads), and a size small feels very fitted; butt/legs are fitted/tight (but not compression tight), calves are loose (to accomodate boots). A thin Rab Meco 120 base layer would fit well underneath, but anything else (e.g. fleece) would have to take be at the mercy of the schoeller stretch fabric, and the waist would feel uncomfortable with the extra bulk. Inseam is fine, I normally wear a 30x30". I suspect that for people complaining about the high waist/short inseam, the pants are actually too tight and hence have to be worn higher up than normal, in order to fit.
If you are going by american sized jeans/pants sizing, I'd recommend you size up. For reference, timberland 30"s are too loose it the waist for me, and I'd wear docker 29"s to fit my "real" 30" waist. I'm rating this as true to size, as it actually fits as I expect, versus being too loose.