Hard to get started but once it works it is awesome.
I was able to use this vxdiag vcx nano gm with tech2win software to read the CMP retard setting on a 1997 chevy C1500 to ensure distributor is set correctly. This eliminated the P1345 I had after replacing timing chain and re-stabbing distributor. Misfires still occurred. Used this to then read individual cylinder misfires. I then used tech2win to test individual fuel injectors of the spider assembly on this same 1997 C1500 which indicated the 2 faulty cylinders. Replaced spider assembly and no more misfires. Unable to diagnose 2 fuel injectors dumping fuel at 100% of the time otherwise. Paid for itself instantly and will be useful for any other GM, chevy, buick vehicles that I have between 1996 and 2013.
So stop reading reviews and buy it now!