I just got mine done at California Tint in Rosemead for $120. They used Greystone (
http://www.johnsonwindowfilms.com/GSN.php), and I got 17% for back window and 34% all around. They did an excellent job imo.
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2006 Jet Black 325i, ZPP, ZSP, Steptronic Auto, Navi, Xenon