I've had a Light-in-Sight in my MINI since 2004, and can't imagine life without it. My father drove my MINI once after I got it and immediately ordered one.
One note, though: there's no adhesive. It's a (hydro)static-cling device, which is why it's so easy to transfer. I've had it on 3 windshields now and it will go on the 4th when I next take the car in for service.