Sentinel, I disagree. I think though that they should instruct the reviewer on how to use the unit properly. There is a learning curve and I doubt the reviewer cares to negotiate that.
As for the consumer looking at features in their differential, it distinguishes EDIG's unit from the others.
Like someone else stated earlier, their brother's new mercedes has it, doesn't work well, but I bet it helped sell the car, and with time he may just get the hang of it.
Using "next" and "back" works quite well, by the reviewers own admission.
I vote for keeping it.
