A quick impression from driving it back from dealer in the stop and go traffic.
1) The SC does not turn the truck into a drag racer. It's very smooth when it engage.
2) It does whine a little when engage, not bad but you will know it.
3) SC triggers around 30-33% throttle position (per Scangauge), the transition is smooth.
4) Once SC engaged the truck just keeps pulling without down shift.
Overall I'm happy with it. Will need to climb some really freeway pass to see how it handles the heavy hauling.
My mod list is almost done for now. I'll need tires for sure, still undecided on 33"(255/85/16) or 32" (265/75/16). I think I'll know which tire to get after some freeway driving to Tahoe.
Next thing to do is bring the camper to ATC to have them install Hi-Lift mount and Jerry can holder.