Welcome! We just got our Prius 3 days ago. I'm glad you had a good experience at Koons Tysons because when I was researching several people told me they had bad experiences there. We put the EZ Pass on top of the dash below the rear view mirror (attached to the dash, not the windshield). So far it works fine. With all the giant SUVs out there, do the body side moldings on the Prius match up to where the door would actually hit the car? It's annoying to have the moldings and *still* get dings...
