Instruct: Classify an Amazon review into positive or negative sentiment.
Query: Mistake

This product was excellent for about three months until the sound went out. Prior to the sound going out, the major complaint was the sound quality. When travelling on the freeway you could hardly hear the navigation sound. When WA state set laws on cell phone use, we used this as our hands free device. To our disappointment, it only lasted three months before losing all sound.Second complaint, it sends us driving in circles at times because the satellite can't catch up to the direction of the car soon enough.There has got to be better out there. Back when we bought it 1.5 years ago, this was the best one rated by consumer reports. Do your research ahead. Instead of research, talk to people that actually own the model you want to purchase.