Personally they are a weak point in the car. I have a convertible and noticed rust in the bottom on my trunk on the antenna side. I was always convinced the seal was leaking. Had that repaired then when i redid the body I had the antenna removed and the hole covered and painted with the rest of the body. My windshield has an antenna built into it. There are no radio stations I cannot get and I have a gps system in my car with the antenna inside the dash at the defroster vent location...it works great even there.