I agree first thing I bought when I got my car. Still under factory warranty but when that ends will be nice to have. Well worth the money. Have a Hex+Can USB been playing around by no means an expert. Will help if I can.
If all your cars are CAN interfaced, you could just get the micro can cable for 250. The hex/can cable is the most versatile, but you don't need it if all your cars are one or the the other(can interface or hex k wire interface). Check Ross techs application guide for that.I have a few tdi's and an Audi A6 which I do all my own maintenance on I absolutely hate dealerships. On the Audi you need a vag to reset the service reminder so stupid. The dealership wants $270 to do and oil change and rotate tires and some other stuff that I can do for an 8th of the price. It doesn't hurt the car but its annoying every time I turn the car on it says service just annoying. I just can't justify spending 350 on some computer software to reset a light on my car and do some diagnostics.