Mark me up as one of those that doesn't use it, even though we hauled from Calgary to Quebec City last summer, over 9,000 k, not once did I use it.
With the tow haul mode and the exhaust brake I feel a lot more comfortable old school peddling works for me, as a matter of fact I rarely use it when not towing as well.
As was mentioned earlier in the post infind you get complacent!
My son just got a brand new VW Gulf, it has lane tracking, and accident avoidance (believe that's what it's called) it takes over the steering and braking, scares the bejeebers out if this guy!
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2014 Dodge 3500 Laramie 6.7 Cummins, Exhaust Brake.
2013 Cougar High Country 315RES