I have the Max Power with an AEM cold air intake and Banks exhaust installed, and have no problems with the Jeep running lean.

 

It would seem that the average person buying a programmer such as this would be pretty much in the exact same boat, on average likely an aftermarket high flow air filter and an exhaust. On my 6 speed 2 door I have a CAI, headers and exhaust and never felt that I was getting much of anything from the Hypertech.

Perhaps this explains things or suggests they aren't at all surprised with people not seeing much in the way of a performance gain. The use of their programmer should still monitor exhaust gas temperatures through the ECM and correct the air fuel mixture. If they can't get that little piece right, and can't deal with modest upgrades to the intake and exhaust they are truly doing people a disservice and potentially harm to their engines with a lean air/fuel mixture.