I went to these guys 3 years ago, works and looks great! Automotive Car window tinting Pinnacle - Tint Plus
FormulaOne is now owned by Llumar. I posted in your other thread (I think it was yours), but Perfect Window Tint in Santa Ana has done many Prii and they carry Llumar.
How much did they charge you? They asked for $500 Tint Pros in Huntington Beach ask for $425 STEVE'S PROFESSIONAL GLASS TINTING Upland $350
I got my other car tinted at Steve's through a group buy for $300 (this was 7 years ago). He did a good job and the tint has held up well (Formula One Pinnacle).
I got them tinted at Perfect Window Tint in Santa Ana. I found him on Yelp. After talking to him (Sal), he seemed like a trustworthy guy and very knowledgeable. Plus he was really close to work. After dropping off my car I just walked back to work. He carries Madico, Llumar, and Huper Optik. http://www.yelp.com/biz/perfect-window-tint-santa-ana