Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Your Own Personal Trainer

The Garmin Forerunner 305 GPS Receiver with Heart Rate Monitor is one the best coaches I've ever had. I'm a distance runner and with a glance I can see how far I've run and how long I've run. I can also see how hard my heart is working and my current pace. When I finished with my run I upload all the data from my Forerunner into my PC for analysis and keep a history of my progress.