Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Does what it was advertised to do

Although I feel the prices for these Garmin maps are way too expensive they do work well with my Garmin 60CSx GPS. To avoid any install or operational problems I just bit the bullet and bought their map. So everytime I use the GPS now, it works perfectly and that's worth a lot to me to have that kind of confidence in my gear.