I used mine probably 80% of the time off-road. I used it so much the cable broke at a very inopportune time on Pritchett Canyon.
Helps get started on steep climbs and to maintain steady driving over rough sections.
I didn’t find it too helpful as an alternative to cruise control since you have to give it more throttle on any hills.
Not suppose to be a alternative to cruise control.... Won't say I never tried to use mine as CC either though.