I too am not a fan of the heat. It is however necessary for my wife. I'll ask about the dual controls- this is the first I've heard about it.
Howie, before getting it I was skeptical. Not after using it some. Used it for several hours on the trip back from York during 40 degree temps on Sunday. It's surprisingly nice to have the option and really easy to come to enjoy having availalbe.
The sales guy told me they were better now about more even heat between front and rear then when my black seat was purchased four years ago. They were just starting to offer the heated option then and, apparently, didn't quite have all the bugs ironed out of it.
FWIW, I like it enough that had it included in the seat for the Road Glide I just ordered. So for a bike that will have only one seat as an option I chose to get it.