Instruct: Classify Amazon reviews into positive or negative sentiment
Query: It works but...

The power cord works, but there is a design flaw. If by chance you do not plug the cord perfectly straight into you lighter socket there is a chance the end of the plug will snap off. The metal contacts on the end of the plug will then be flung into your lighter socket-shorting the circuit and violently frying/burning the car's fuse for your lighter/power socket. I would strongly recommend carrying extra of the appropriate size/rating fuses for your car's lighter/power socket and for the plug's internal fuse. If either one goes then you've got a useless GPS-not good when you're in an unfamiliar area.