Computer Programmer

[Phantom01Pathfinder]

So i know this is off topic a little, but ive always tried to convince my dad to get a power programmer for his '07 GMC Sierra. No go. But i recently saw on the 4x4 parts site there a computer programmer called V-Force Plus Performance Module.

 

It say it does the following : * Provides improved performance, acceleration and the ability to monitor your Nissan's information.

* Optimizes ignition advance and fuel maps for best HP and drivability.

* Select from 14 different screens to monitor throttle position, mass air flow, manifold pressure, fuel economy and air/fuel ratio.

* Allows you to monitro driving habits for best fuel economy and performance.

* Backlit LED screen

 

I am very skeptical about computer upgrades, but has anybody had experience with this unit???