Installed this in my '03 Miata. No problems. Everything works well. GPS is nicer that my Garmin or TomTom and is full of features. Sound quality is very good. It won't blow the windows out but does not distort at full volume. I bought a refurbished one but you would not know it from the packaging or condition. It would be nice if the USB was in the front face instead of wired to the back. There was enough wire to run it to my console. Love the back-up camera (paid >$20 for one). This unit is very cool. I will never be able to go back to a standard unit.