You have HO on your other car? just curious why you choose M3 crystalline over HO. This might help me decide..
For many areas, it's a LOT easier to find a place that does 3M Crystalline than Huper Optik. Back when I last looked (years ago, but I don't think things have changed much), the only place in SoCal that installed it was down in Orange County in the Irvine/Costa Mesa area. 3M, being a huge company, has installers in practically every city that has a tint shop.