Thought it would give better gas mileage, but really haven't seen it. Easy to follow directions and updates installed. It may growl a little more, but I also installed a k&n air filter at the same time and it was supposed to be a boost and still haven't seen any boost with either! So maybe if your foot is always in the gas it may save some, but the Tundra 6 speed is a shift monster and I did notice shifting differences but no change in my.
Wider selection of tunes would be nice
Of the included tunes, only 2 do not require premium fuel. A high mileage, and an 87 tune. Of the two, I really can't tell much difference between them. Both do speed up the gear changes and feel a bit more torque, but the fuel economy in the high mileage tune is no better than stock. Fuel economy in the 87 tune is also not much different from stock. A wider selection would be a good upgrade. As to the hardware, it is easy enough to use, if a bit slow. About 15 min to load a tune in 5.7L Hemi