the biggest issue with the hypertech is you are limited as to how you can change things. i had one for my last vehicle and it was cool but very limited. you either turn the "tuning" on or off. Its not different than a reprogrammed pcm excpet that the pcm can be adjusted to whatever mods you have. also you have to remember that when they say 16hp gain it doesnt mean 240hp+16hp =256hp. that 16hp might be gained at 2500rpms and your peak hp gain might be something like 3hp.