I've ran the ARB deflator for years however recently I got a set of Boulder tools deflators Amazon.com: Boulder Tools Tire Deflators and 80 PSI Tire Pressure Gauge - Adjustable, Automatic for car, Truck, Motorcycle: Automotive

They work great but I think the ARB style is faster. It's just hard on the knees having to stay crouched down the entire time.

I have the ARB E-Z Deflator. Works great. It's also good if I need to change a valve core for some reason. It is not as fancy as some who like to air down 4 tires at once with screw on deflators, but I really do like having the gauge.