Mine is quiet like mouse.
They`ve come a long way.
Mine will break the rear 4 wheels loose off a stop light if I push on the go pedal too much so i don`t really need anymore power via programmer but deleting the Emissions does add a couple miles per gallon and the oil don`t come out like tar anymore.

EFI live is the only way to go now for Cummins and Duramax deleting or otherwise. All fully custom tunes, you can pick the tunes and have them built how you want as in transmission safe tunes. Optimized stock, towing, milage, race, and max effort (max effort will toast your transmission). Plus you can hook-up the Edge Insight monitor to use as your gauges to monitor everything and use if for switch on the fly power level settings on model years pre 2013 on the Duramax (Not sure on the Cummins).