I have not looked into this, however, if you are planning of working on your truck and pulling codes I hear the ForScan software and Dongle will allow you to disable the ASS. I heard this from an F150 owner... so if anyone has one that can validate that rumor it would be good to know.
I went and purchased those about a week ago they are pretty nice, if you are going to do these, I would recommend thinking about the throttle body at the same time especially if you plan to throw a tune on your rig.
As for the GFB DV... unless you are going to be tuning the truck for...