I went 30 all around with 20 on the back windshield.... Wish I would have gone 20 all around, except in my area (backroads, no lights, deer) I am kinda glad I only went 30 in the front.
I went to Fresh Designs in College Park. They are on rt 1 by the IHOP. The yellow building with the wheels in the window, they are down behind there. Got my whole car done in something ridiculous like 15 minutes. Think it cost $140, 160, or 180 (can't remember, something like that) with lifetime warranty