I had the 5 Star on my 2014 Bounder it was a significant improvement, put 4th gear into the downshifting pattern no more 5000 rpm wail on a simple downshift. I also put it on a 2016 with the 6 speed and it was in my opinion worse than the stock Ford tune.
Brenda & AL
2017 Thor Venetian, T42 "Groot"
2020 Chevy Sonic, 2019 KTM 790 Duke