I installed mine on the dealer supplied rear license plate frame where its out of view and doesn't mess with the aesthetics of the car's design. The frame is the exact width as the keypad so it fits perfect. Couldn't bring myself to put it on the door of such a nice sportscar. Even an integrated one would seem out of place.
I love this thing. Not only has the stress of locking my keys in the car gone (I'm absentminded), now I don't have to go in the house every time I want to take something out the car or put something in. The ability to open the trunk with it is really cool too. Love dealing with Tousley Ford Parts. Good deal at $65. Get one and stop loving the 80s