very easy to use, plug the Vagcom lead in to your cars OBDII port plug the USB end in to your laptop. run the vagcom program, select autscan and thats it wait til it finishes the scan and itll show you the error codes. you save, copy or print the results.
i paid £150 delivered for mines, the actual Vagcom lead contains the serial code inside and opens up the software whens you use it so you get all the features!
I tried the cheapr one and i coudlnt get it to work that was £15 from ebay.