I have these...and for some reason I find the binding on the legs to be tight. I am 5'4, 110lbs, a size 2-4....I have the smalls, I prefer NOT to have the sausage feel, and they do ok everywhere for me except the thighs. I don't have abnormally large thighs (none of my other shorts do this).

I don't have a problem with the chamois, but the years of riding multiple horses and bikes have pretty much left me with leather for buttskin (attractive, huh?)