Hi Ron,
I've been using it for awhile now. Some observations which might be helpful:
The software takes a l-o-n-g time to install the first time... apparently lots of wierd drivers get loaded.
I've found I have to put the gauge in test mode each time before attempting to save a desired configuration to the gauge. If I don't do this, the configuration sometime won't "take" and the gauge could still have the old configuration in it or get stuck in test mode. There's no way to tell if a gauge is in test mode or has the proper configuration unless you actually connect it to the vehicle gauge wiring harness. Until I figured out this two-step process was necessary each time, I wasted several trips between my truck and my computer in the house.
When setting a warning limit on a gauge, I think you'll want to concentrate on using the relative position the gauge pointer in the software. For example, let's say you have a gauge that's marked from 0 to 40 psi and has 20 psi at the top (the 12 o'clock) position and this where you want the warning light to come on. In the software panel, you'll want to set the warning to activate when the pointer is also aimed at the 12 o'clock position and not necessary worry about the number the pointer is at on the graphic. This is because in the software, the gauge graphic may have a different range than the actual gauge say. This should make sense when you actually start playing with the software.
Thankfully, once you go through the trouble to properly set up all your gauges just the way you want, you'll probably never have to bother doing it again.
Have fun,
John L.