Works as described so far
No issues. Simply plug the device into the OBD2 port. A few light flashes then it's done. According to the display the vehicle is in V8 mode all the time. Have not used it long enough to know impact on fuel or oil consumption. Oil consumption is the reason I decided to try this.
No extra MPG's
Overall the tune was easy if you want a standard tune. I ordered this tuner in an attempt to improve fuel economy. Unfortunately I did not see any difference whatsoever and was disappointed that I could have used that $300 on fuel. Tech support first indicated that the mpg booster was in advanced tune options but finally admitted that it was not. Don't waste your money if fuel economy is your goal.
Works as expected
Intuitive interface. Easy to use. Made changes to tire size. Plan on a regear in the future. Was able to turn off TPMS. I was hoping to be able to create a increased idle setting for winching, but you must have the tuner plugged in when you want to increase engine speed. Did take a good 30 mins to flash on a new 87 octane tune. Did notice a little increase in throttle response, but not blazing.