Very easy installation took less than 5 minutes to turn on all sensors and calibrate everything. I know one of my concerns used to be safety and crashing at high speeds. Rest assured they are not easy to remove without the tool provided. I tried unscrewing them after tightening the nut and I first made a hole in the valve before removing these things. Also, they were still tight when I drove around 80 for a long time (over 1 hour) on the Autobahn. They didn't take long to calibrate, just a short drive around my area and back and then they were ready to go. Give me stable temperature and pressure sensors everywhere. This comes in very handy when I have a tire that I now know has a small leak thanks to these sensors. All in all a great product that is easy to install, use and maintain with little effort. I would definitely recommend buying this if you are active and don't want to end up with a roadside apartment not knowing it could have been prevented.