I only paid $135 for my tints.. 15% all around, no windshield. No problems and it's been over a year. Not even fading. Included is a life-time warranty as long as I own the car. Warranty covers bubbling, discoloring, etc.
EDIT: This place is used by my local Acura dealership and they are the ones who recommended me to them. A friend is a GM there so I asked him first.
2010 E93 M3 / MS Catless X-Pipe / AA Catback / Vorsteiner Vented Hood and Bootlid E93 Trunk / ADV1 7.1 Wheels GB / LS3 LED Lights / Harrop Supercharger