I bought a laser cut kit of the 3M product on ebay for my e70 and installed it myself. The local dealer wanted $599 for the kit and install, I paid $95 for the materials including a very detailed install dvd and printed instructions. This was the first time I installed this product and it took me about 2-3 hours to do the install. I wasn't happy with the hood piece install, so I removed it and ordered a new hood piece. I'm sure its not 100% perfect as a pro would have it done, but at 95% perfect is good enough for me and you really cannot tell its there unless you are specifically looking for it. All in I will have $150 into the install and the satisfaction of doing it myself while saving $500. I'm contemplating doing my E93 and Range Rover next.