I have the Bullydog triple dog. It is good for about 377 hp I think to the rear wheels on extreme, but in any case it has a lot of good features many do not. I also have the older outlook monitor version 1. 2. 1, and other than the backlight flickering for no reason I can find, it is a neat unit and will allow you to set defuleing point based on the max EGT's you want to tolerate. I got 1523 degrees on max power with stock turbo and engine but with homebuilt ram air, amsoil ea air filter, stock air box, turbo silencer delete tube, and banks 4" turbo back exhaust. I solved my EGT prob by switching to a HTT 62/14 turbo which netted a 250 degree drop in egt. I have been impressed with hypertech and granatelli BIG G programer/modules but i was interested in MPG gains with a little extra power. There are so many programmers/modules out there I don't think anyone wants to answer this thread. I got maybe 1-1. 5 mpg by using the bullydog and had no issues with tstock transmission till now at 110k miles, but I bought the rig when it had 96k miles, so I don't know how it was maintained/used. Bullydog guys are knowledgable and helpful and the thing is net updateable and can be used on GM, ford, or dodge trucks, which NO ONE else can claim. I don't know if it is detectable by dealer. They never asked when i deprogrammed it before taking in my 2005 dodge cummins, or even commented. I never had a transmission prob, though, bit i did have MPG issues with that truck. It didn't want to get over 17. 5 mpg empty!Oo.