I know people think that pressing the accelerator harder/faster accomplishes the same thing as this PM but it doesn't.I had a 2000 Saab 9-5 Aero with a sport mode button in the gear selector, this PM is basically the same thing but with numerous settings as opposed to the Saab's one.It's hard to describe to people who have never felt it but the accelerator is much more sensitive and responsive with every step up in the settings.I've been driving in the city +10 mode for a few weeks and decided to try turning it back to stock to see how much of a difference there was in that mode.It was a night and day difference, the truck felt laggy and heavy.It's expensive and isn't for everybody but if you want to change the feeling of your truck to make it feel more responsive or even sporty, this might be a good mod for you.Once installed, it's controlled via Bluetooth by your cell phone which makes dialing in the best feel for you extremely easy and convenient.