I have used a Larsen 2 Mtr Thru Glass antenna mounted on a Chevrolet Suburban now for 8 months. Maybe I have done a better job at installation than some out there since I show a very good 1.5:1 SWR accross the band and no problem running 50 watts. This antenna incidentaly is mounted on a factory smoke glass window.
I like this antenna!. It is versatile, reliable and easy to install with no damage to the vehicle.