No, this thing won't fix your vehicle for you. But, it does tell you what code is making your Check Engine Light come on. That information, and some research in a shop manual or on the web (or by asking the right friend), can lead you to a faulty component without paying a dealer $75 or more just to scan your computer and tell you what code(s) are set. Two or three problems solved and your purchase is paid for.
I have used a professional scan tool (Matco) that a mechanic friend lent me. This product is not as ruggedly built; but, I'm not going to be using it day-in day-out like my friend does with his scanner. The Actron unit is certainly rugged enough for the do-it-yourselfer. The supplied case will protect it from being knocked around in your tool box. The case is big enough to hold the scanner, OBD cable, USB cable, owners manual, and the CD that has the software.
Functionally, it does everything the professional unit does and then some.
Reading the stored code told me that I had a "long term fuel trim" fault. The Record Data function allowed me to record six different engine conditions while driving, view them on my PC, copy them into an e-mail, and send them to my buddy to analyze.
After looking at the data, he said to clean my mass air flow sensor. That took 10 minutes, and half a can of brake cleaner. Result, my truck runs better, and the check engine light doesn't come on anymore.
I figure I have the unit half paid for already.