All my tailored shirts still have some billowing. Granted, I haven't had darts put in, simply had the shirts taken in at the sides. Like Shrtmaven said, with a slimmer shirt it's not difficult to get a great seamless fit at the front or sides but the extra fabric would have to be at the rear. Plus, like teddieriley said, moving will make the shirt lose shape. However, I just got a Polo Shirt in custom fit that I'm going to go all out on to see how slim I can get it.