There's also Invisi-Guard Automotive Film. They use a Llumar-based film with lifetime warranty (only to the original owner). I've had this film installed on my 550 and the front end was factory new till the day I sold her. If you have any questions, give Jeremy Gomez a call at 707-328-5865. He's mobile all over the Bay Area and has been installing clear masks for years. Tell him Roel from Salinas sent you.
I've used Invisigard before and although no major issues, there were some things that always bothered me about the laser cut stuff he used that never really matched both sides. It's hard to describe. One side there may be a 3mm difference from another. Premier definitely costs more, but I find that their quality is better than any I've ever tried.
i used a guy out of the bay area and he is mobile. he used a different film than the 3M stuff. he did a fantastic job. this other company film has less of the orange peel look than the 3M material. it also carries the same warranty.