If you are interested in the Edge EVO Race, I have been running one on my 06 LBZ for the last 3 months with good results. I pull on level 2, which includes a built in turbo brake, and adds about 65 RWHP to the truck, runs very cool (I have yet to hit 1350° while pulling my 11K toyhauler), and gives it the extra kick to pull hills faster. I really enjoy using the tuner for ease of use, gauges, easy installation, good shifting characteristics, low smoke, and so on. Level 3 is about all the stock Allison can take, but guys with TransGo jr. kit seem to be able to run level 4 w/o any slipping.
Let me know how I can help.
Chad