Very satisfied. The TS408 is easy to use and does exactly what it promises. It was easy to get to the Autel website to register the unit and download the latest software. I do it myself I'm tired of going back to reset my TPMS after a tire change. With the TS408 I can reset the tires in about 2 minutes. Really comfortable. I also reset the tires on all my friends' cars. Worked great on all cars. The built-in instructions on how to put a specific vehicle into TPMS learn mode are very handy. I used it on a 2015 Silverado, 2009 Cadillac CTS, 2009 Ford Fusion, 2007 Silverado. The only negative observation is that the tire sensor voltage level shows as OK or Good etc. and not voltage. This can be a limitation of the tire sensor, so I won't delve into the TS408 test for that reason.