Bests & Worsts Reviews from Amazon

Bought this, spent 15 minutes studying the manual, plugged it in, and it worked first time -- read out the "check engine" code, and, when later plugged into a PC, allowed the details to be printed in a nice report. The only negative I've noticed is that when you reset the "check engine" code in the car's computer, it erases the reader's memory of it, so you have to do the PC printout before resetting the code. Some folks believe that if you use a device like this on one car it's "locked in" to that car and can't be used on a different car. This is not true -- I've used it on several different cars with no problems.