Since its soo cheap to buy, Id get it and use it when I park the car. I park in the garage, but at other places I dont like to park in the shade cause crap from the tree fall on my car. I'd buy this and get those circular window shades and make sure my dash is safe while im gone. But when I drive, i would not use it and I would no put velcro on my dash, so only have it when my car is stationary...