Researched this question here and on CompD. Didn't come up with much. Seen one guy comment on not being able to use his Spartan on more then just one truck. I just want to hear yalls likes and dislikes on these tuners. Not so much which one is best. Also does any one know when the black Max is suppose to release again? If I burn one more tank at 11mpg I think I'm going to cry. Lol I have to get a tuner and these are the three I have narrowed it down to. Exhaust and intake are coming soon.