The Pacemaster Gold Elite treadmill is the nicest of our Pacemaster line up. It is the new and improved Pro Elite model that includes some very useful features. This treadmill is Polar compatible meaning you can use a heart rate transmitter (chest strap) to send information to the treadmill allowing it to adjust based on your heart rate. It also has quick touch programs and a very extensive program selection to keep you motivated. Since this is a bigger heavier treadmill than the other Pacemaster models, This treadmill is our top pick for heavy runners or multi-person usage. Also, anyone who really wants specific heart rate based workouts will love this treadmill. It has some of the best interactive heart rate programs on any treadmill in existence.