I can't tell you about the .223, but my wife and I have Superlight 7mm-08s. We love them. They're accurate, light and compact. People here talk about the light contour barrels heating up and accuracy going downhill. We haven't experienced that for two reasons. First we got them last Fall and have only shot them in cold weather. Secondly, we never shot a series of rounds in fairly rapid succession. We'd take a shot, check the target, adjust the scope, etc. Hunting, we'll never have to worry about a hot barrel. My .223 is a standard contour and shoots well.
Good luck if you buy it. I think you'll like it.
Pete