If your Ford has the 5.5' bed you will have a hard time getting the clearance when hitch is mounted in correct position. A slider may help in tight turns when parking, but even a regular turn on the roads can get too close on that short of a box. The auto slider may help, but add a lot more wt compared to a std type hitch to the truck that you can't spare.
I saw this thread on another forum that has a load of comments to review from folks that have used a similar truck. Maybe it will help you.
http://www.rv.net/forum/index.cfm/fu...d/23353636.cfm