Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Doesn't do what it promises to do - accurately show the traffic patterns

This is a great idea but one that is not ready for prime time. The signal is either poor, or the traffic reporting system is very bad. Soemtimes I will be sitting in traffic at 6 mph and there is no indication on the GPS that there is traffic. The signal is poor if I am more than 20 miles away from detroit, so planning my route BEFORE I am stuck in traffic is not realistic with this device. The specificity is poor - in other words the symbols don't tell you whether the traffic is very bad (i.e. how slow is the traffic). It might say heavy, but sometimes that means traffic is going 50 MPH.It is actually sometimes more accurate to just listen the radio.Maybe the idea with tracking our cell phones will come into fruition some day. For now, I would avoid this device. Too bad - it's a great idea on paper.