Needing an air chuck for a portable tank this insures I can gauge the pressure and by having a tire valve on the tank I can also check tank pressure. Eliminating two gauges, or forgetting one.
You will be happy you picked this up. It works pretty well. It is pretty accurate and saves a lot of time. Fire it up and get to the pressure you need without switching back and forth between the air chuck and pressure guage 20 times. The only problem I ran into iis when I try to use it for anything smaller than a lawnmower tire. This is made for car tire, truck tires, trailer tires, ATV Tires, ect. This doesn't seem to be very applicable for bicycle tires or pumping up footballs or soccer balls.
The Craftsman Tire Inflator / Gauge is heavy duty and hefty -- should last a lifetime. The built in guage makes filling tires quick and easy -- no need to keep checking pressure with a manual guage. I found the guage to be accurate but somewhat hard to read if not at the right angle. I added a quick release fitting to my compressor hose so I can quickly change out this attachment when needed. If you want and easy to use, durable inflator, this is definitely worth the extra $$.