I just got my Hyperpac installed and absolutely love it! I put it on stage 1 for about 2 minutes then went to stage 2. It shifted very smooth and the power was great. I drove it for a little over an hour and then put it on stage 3. HOLY CRAP!!!!!! I took it over to my friend who has a 03' Dodge with Cummins and let him drive my truck. He couldn't believe how much better my truck drove than his. He said it shifted smoother, rode better and was way faster. Not to mention my truck has a million more options that his does. I know this tuner is not as hot as others out there, but it suits my needs for now. I like the fact it is a safe tuner for my stock tranny as well. The display is really cool and shows you gauges for a ton of stuff. I'm looking into the EGT module for it next.