This thermostat holds the temp almost perfectly at 190°F on our Contour. The Motorad we had would jump from 195° to 170° all the time, which was frustrating when attempting to measure exact performance with as little variables as possible. This is also handy during the winter as our heater maintains a constant warmth, instead of hot and luke warm. Would most definitely recommend the Superstat over any other (especially the cheaper standard model).