After all the installation notes, there's no way I'm going to skip over talking about how Monster Valves work once installed.
"Fast" is an understatement. "Smokin' fast" is more like it. Imagine 1 psi per second!
When airing down, you need to begin closing the red ring before you get to your targeted pressure, otherwise you'll overshoot your mark.
When airing up you'll use the Monster Chuck on the Monster Valve itself, and clip the Powertank air gauge on your stock valve. Walking to each corner of your rig and attaching the Monster Chuck and pressure gauge to their respective valves takes longer than the filling itself.
If you've waited by the side of the road, minutes passing by as your undersized compressor struggles to fill your tires, rest assured there's a faster and a better way to air up and down.