No extra care. They just tell you not to roll the windows down for about two days to let the film adhere correctly. They truly did a great job, no bubbles or peeling or anything. Like I said, it might cost you a bit more but it's worth it when you see the end result.
And my car is black too and with the tint it looks awesome.
2005 Black GT with Red upgrade interior, fully tinted, 18's with ASA/BBS 5 spoke studded wheels, Michelin Pilots, Borla S-Type catbacks, K&N FIPK cold air injection system.