I got my copy through Google Play. I'm glad it worked out for you!
The level of detail in the information that it can pull is WELL beyond what the tech at the dealership can access. It shows things that, while his computer sees it, stays hidden from everyone except for STAR. Combined with the Tech Assist CD-ROM, a multimeter, and some basic hand tools, I can't think of anything off the top of my head that can't be diagnosed on our cars.
I'll post up some sample data, if anyone's interested.
Edit: to get the full benefit of the software, you NEED to have a quality OBD dongle. The developer strongly recommends Scantool's OBDLink MX, and with good reason. There are systems in these cars that need power and signal from different pins than the standard configuration, and the cheap blue ELM327's won't do it. The standard ECU's - PCM / TCM / BCM - will be fine, but some of the more esoteric ones like the RFH and the blind spot sensors, and I think the ABS as well, are going to have some issues if you try to connect to them with a cheap plug-in.