I love 501 jeans, they fit just right in all the right places and I prefer button fly to zipper.  Note that the polished black is a bit different than the usual black jean (there is a plain black 501 as well).  The polished finish produces a shiny, more finished jean look which means that wrinkles are sharper and more noticeable -- the fabric is stiffer than the plain black jean.  If that happens, the tried and true technique of spraying the jeans lightly with water, wearing them or giving them a quick press will help.

The stiffness of the fabric is part of the clean and neat appearance but unlike other 501s this also seems to reduce the "give" in the fabric and makes the fit tighter and slightly uncomfortable at first -- hoping this will work itself out after a few washes.