Well... I bought 3 tunes from them. I am eager to get them loaded up and compare them to the 5 star tunes. From what I'm told.... MPT runs more boost. 5 star runs around 18psi under WOT. MPT runs 20. Apparently MPT increases the stock rev limiter as well. 5 star has been a notable improvement in power and absolutely did what they said it would do. However, I have not found any of their tunes to handle the 10 speed transmission logic very well. The daily driver tune is just very mellow and it shifts every single gear no matter what. Under gentle local driving it goes 12345678910 and it is pretty annoying after awhile. The performance tune feels great and has snap and power but the transmission is SO twitchy that it is constantly downshifting with even the slightest touch of the throttle. It's not a smooth, intelligent driving experience and to any passengers it seems like you're constantly gassing it. I've owned/driven many performance vehicles like most all of you, and so I have a good frame of reference in terms of what a high performance car should feel like in terms of shifting logic... everything from double clutch high end to old school Fox body mustangs. In my opinion 5 star is close but they aren't quite there... there is a little bit of overshooting I think.... like trying too hard. If you were racing the truck around a track or doing Baja their performance tune would be appropriate. It's more of a TRACK tune than a street performance tune. So you're stuck between a track tune and a very mellow, gear happy city tune. I think they will get it right before too long. They are constantly revising and looking to make it better. It's not a knock on them. They are great to work with and their tune is much more powerful than stock. So will MPT be better? I have no idea. I'm going to evaluate them and find out!