This TPMS worked great right out of the box and was very easy to install. Just replace the valve covers and find a place for the display. In the morning, the display refreshes all tires in two to three minutes. It seems to remember the settings when it was parked and the gauges aren't constantly updated. The sensors appear to update more frequently as barometric pressure changes and are accurate to within one psi. My only complaint is the size of the external sensors. It looks like they could have been made smaller. The on/off function of the vibration sensor display works great. The display turns on as soon as I open the door. I'm thinking of buying a second system for our 2005 Polaris.