Diesel Performance Chips

[davesbb4x]

Hey, I have a 2007 5.9L Mega Cab 4x4 with only 30,000 miles and an extended warranty. Have been told by my dealer that the Diablosport Extreme Power Puck is the way to go. Now he's saying this because you don't have to flash program the computer like other tuners, which leaves a foot print and will void the warranty. Has anyone used the Power Puck and if so how did you like it? Also what type of power increase did you see.

Thanks for any input.
Dave