The deal was, as I recall, the very dark tinted band at the TOP of the windshield was standard on A/C equipped cars and optional on non A/C cars. The much lighter tinted glass was optional all around. Either 'windshield only' or 'all'.
Definitely worth getting on most colors in my opinion. With black cars and some cars with black interiors it doesn't make much difference but most cars really benefit from the tint in my opinion.
