I haven't yet done my MS yet, but am going to this coming Friday. After searching through several blogs and forums, I'm using Greg Simms (Force Field; but it seems like a one man shop) - 408.691.6791. I don't know yet how he will be, but other MS and Ferrari owners have raved about his work (he mainly does Ferraris, but lately, he's been doing MS paint armor work - he said he has 3 this week).
He uses XPEL Ultimate, and in my discussion with him, he said its the best film out there. Elite Auto Films (also on the peninsula) also uses the same film.
Premiere Protective Films in Fremont uses a proprietary film from a parent company (Prestige?). Its hard to say how it compares with XPEL. I did speak with at least one technician that has used both the XPEL and the Premiere product, who decided that the XPEL outperformed the Premiere product (and thus uses XPEL now). He also said that both were very high quality products though, so the difference may not be that consequential.
Finally, when I was looking into this, I got quotes for just full front hood, fenders, and bumpers from Premiere, Elite Auto Films, and Force Field. Premiere was the most expensive, then Force Field, then Elite Auto Films. All of them were highly reviewed in blogs/forums/yelp.