Hey Chris,
I just had my new C4S 3M'd and they put it on the mirrors, hood, bumper, fender mounds, and on each door edge (so if you open your door, it is protected if it hits another car, wall, etc). There is a very thin visible line across the hood, but only noticeable when right up looking at the car, otherwise invisible to the car next to you on the road. I like it and would suggest getting it.