Our BRZ and Trailblazer already with V-Kool OEM series tints. The TB's front WS tint was V-Kool K14 before I changed it to OEM20. Both BRZ and Trailblazer have the same combination: OEM20 full front WS and OEM05 for the wraparound So far we are happy with the privacy and heat rejection V-Kool provides. And we have no problems with the GPS reception of our Trailblazer's Growl Audio headunit

Our next car (gray market Grand Starex) will be V-Kooled as well because Eurostandard Motors offers V-Kool OEM series as one of their freebies

I'll post sample pics tomorrow