What is the difference.

Okay so i just got my intensafire 2.0, already installed in a controller. I know which modes im suppose to play on for halo reach, so i tried mode 2, everything is the same, mode 3, everything is the same, so i might aswell try all the other modes and still everything is the same, the shooting speed is the same and this is a INTENSAFIRE so why does everygun shoot at the same speed with all modes tried? The only thing i did notice is that i don't have to tap the trigger to shoot, i just have to hold it, but please tell me that is not all intensafire does, becuase i spent 100 dollars on the controller.

PLEASE------------ DO NOT TALK ABOUT HOW IT WORKS WITH OTHER GAMES LIKE COD OR GOW OR ANYTHING ELSE BECUASE I JUST PLAY HALO REACH SO OTHER RESPONSES TO OTHER GAMES ARE USELESS.

Okay so maybe im doing something wrong, if any of you play halo reach and have the intensafire 2.0 how can i make the guns actually shoot faster since thats why i bought the product and it would seem useless to sell a product that doesn't really do anything, tapping the trigger doesn't bother me at all since i have been doing it since i had my original xbox since in 2003, What the heck does the intensafire really do?