Got them installed this afternoon, it was pretty easy. The hard part is having to do it on your back. A tip for anyone else attempting this - make sure you SOAK the jounce bumper nut with penetrating oil before you start. I would have been done much faster if I didn't have to fight that nut on both sides.
Otherwise, pretty straight forward. It is a pretty nice kit: bolts on to the jounce bumper strike plate and bolted to the frame in a pre-existing hole (where you removed the jounce bumper) and another pre-existing hole I between the 5th wheel brackets. I will shoot a couple pics and post them up before I put the wheels back on.