Instruct: Classify Amazon reviews into positive or negative sentiment
Query: GPS

This is a GREAT piece of equipment! Plug it in and go, so simple to use, directions are hardly necessary. I reccomend it to everyone. If I had to complain, I would say the volume control is a bit touchy, and it would be nice to be able to list the city or town you will be looking for services in, before you get there. Buy it!