Just got my car done in VentureShield. I had the same product on my porsche for 3 years and it still looked great. I had a scuff where I hit a cardboard box, but it saved the paint underneath. With that install, I have everything covered forward of the windshield, and no one noticed that it was on. Only a a very trained eye noticed the film. It did get a sap stain in one small dot, the size of a pencil eraser, but you could only see it in certain lights.
On my M3, I did the "extended" hood and bumper, sills, and rear wheel arches/bumper. I paid $900 or so to a Mobile installer.
If you are looking for a great guy in NJ, Call Reno at Armortec. He comes to your house..spends the day in you garage, and unveils the result before sundown! He drove 2+ hours to get to me and I paid $50 bucks for him to drive here. Can't beat that.