I have owned the chrome version of the 28/3.5 and presently own a later black version of the 28/3.5. Both are great and have a tiny size. The chrome version had a nice heavy build quality, but the newer black version has better ergonomics (bigger focus ring).
My lenses are both single coated and render wonderfully in B&W. There is a retro look where wide open the center is mucho sharp, but that does not extend all the way to the corners.