i recently have to choose a diag tool to do some diag on my car, i have been looking for a long time and here is what i get BMW ICOM BMW ISIS ISID A+B+C Plus,and the BMW Multi Tool OBD2 CAS1-3+ KEY PROGRAMMER it is so hard for me to figure out what is the best one,what is the different, how is the quality, software stuff etc, so just give me some suggestion or you have a better one ever used, that would be great... :twoup: