I normally run my Ram 3500 EB in Auto. Really helps when braking. If you run full on, it's loud, acts sooner and more aggressively. It will slow you to almost a stop with out hitting the brakes, just let off the go pedal. Around town, I run EB in auto, along with Tow Haul mode on. This holds gears longer, snappier acceleration. Get out on the hiway, take off the TH (if not towing).
Added feature on the Rams is that when starting the CTD cold, turn on EB to help with a much quicker warm up. Use this with the idle up feature to warm up even quicker.