I tried it out on one off my older bmw x5's and it worked fine. The first thing it did was update the obd dongle. I guess it had have power from the obd port of the vehicle to run that part of the dongle. After it flashed the update to it I was able to connect to the car and read codes, etc. The way it displays live graphs made sensor testing a breeze.

Its pretty fast and the coolest thing was saving the information as a report that I could look at in the house afterwards. It was nice not having to screen shot the scan tool with my phone or write down the codes.