Works, and gives one heck of a workout. I'm not a huge guy (5' 7\", about 160ish) and when I get it up to around 3000 psi I have to consider it full enough because that's the point where it gets really rough on the hands. I just have to remind myself, I'm not pumping a mower tire to 10 psi, I'm trying to condense a cylinder to of air to 300-400 times that so it's going to be a pretty good workout. I bought this for a PCP air rifle (Air Venturi Avenger) and after hooking up the gauge, hose, and handle (super quick assembly) it was ready to go. Beyond it being a workout, it just works. I am definitely going to invest in a powered pump for the majority of my plinking, but this thing will always be coming with as a backup. (not really part of a review but, I was exhausted one day while packing up after shooting and busted out laughing when I picked it up and saw a face)