Attached to an old Garmin friction mount that sits on the dash.
I'd be more concerned about someone breaking the passenger window than the suction not working. Thieves see the holder in the window and think, oh the gps is in the glove box. You guys probably all live in better neighborhoods than me so you don't have to worry about that.
I've had the Motorola car mount on my windshield since early December without any problems. I have it as far left and as low as I could mount it. I'm a southpaw so it works great for me in that position.
Verizon + Droid = The only way to go mobile!