I'm using it.
I think the nicest feature is being able to set the warning light. My truck is running 16+lbs of boost, so I set my light for 12.0 AF, that way if I'm in boost I know that light should be on. It's a nice interface. I can't get the RPM at idle right, but it works everywhere else.
Still need to hook up the TPS, and MAF voltage.