I have run DJ's once. I have compared Innovative and Elite on the Dyno...very similar numbers, but Erics trans tuning is better. I have been in a couple trucks that have tunes from Doug...they compare to Innovative Diesel. I have run Matt at Spartan...lots of power, but the trans wasn't there to get it to the ground. When I was in the buisness I tried many, but I would only run Innovative or Doug @ Go Go on my truck. Then again I'm just one person, and thats my 2 cents.