Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Great Radar Detector

Bought the Escort Passport 8500 to replace a 6 year old Whistler that I thought was just so so. On my first trip I ran them side by side and I could not believe the difference. The Escort gave warnings that were at least three times as far in advance, and less false signals. Much, Much better. My one complaint is that the volume does not go high enough.