off road tools

I'm putting together a tool set for the road. I have been swapping my tools between my pickup and my Jeep, but that gets old fast, and something always gets forgotten. I already have the basic stuff (tire repair, jack, lug wrench, jumper cables, and the like), but want to get together a set of...

Has anyone tried one of these yet? Wheeled with a guy today that aired up 4 tires in under a minute with his power tank. I can do 1 wheel in about 45sec with my tank or 20min for all 4 with my ARB. Seemed like a pretty cool set up. Have heard about the 4 tire systems but this was first time...