I bought and installed once I found the package at a discounted price. I have my reasons for not going with a 3rd party tune or a piggyback.
The transmission shifting is so much smoother now. I never had an issue with it but now understand what people were complaining about.
As far as power and torque, I only have the butt dyno to test with. I find the additional torque helps get going just a bit quicker. It looks like there is additional boost and the other necessities like fuel flow and faster throttle response to go along with the boost. I like to watch the boost numbers and definitely see it at higher boost and it holds longer.
I also like that I can leave the unit plugged in and see different readings than on the dash. You can choose 6 gauges to display.
For me it is worth it, especially getting $200+ off the MSRP.