Has anyone tried this out. Seems to be a brand new product that Quadratec and others just started carrying a few weeks ago. I have seen so many mixed reviews with these programmers, but I am only interested in 3.6 results. Is anyone running a 3870 with upgraded software that can maybe offer some review on whether or not this is worth the money? I will mostly want it for supposed MPG gains in tow, 87 performance or gas saver modes, along with calibrating for tire size and tpms.