It does what it says it does. A few things to remember: 1) Remember that air is different than nitrogen so you have to confirm you should put it in your struts 2)Air straight from a compressor or unfiltered source contains contaminants, so make sure you have a good oil/water filter!! 3)If you are in the back country and your strut goes flat, this could save your bacon! 4)You can use any air source which is awesome - just head the first two bullets 5)It takes a minute to build up the pressure in the strut. Take your time, it will work. I felt like the air wasnt flowing correctly at first, but eventually it popped up and I could feel the pressure difference Good luck, stay thrifty and safe!

Follow-up to previous review: After tightening the hoses the air leaks improved. Also, the previous attempt was made with the wing tanks full of fuel and heavy. In a second try with minimal fuel in the wings and no air leak I was able to pump up the strut with about 25-30 pumps on the plunger.

Just tried my new strut pump today. One problem for me, probably not for most pilots you need to be heavy enough to depress the plunger. At 140 pounds it took all my weight with my feet off the ground to get the plunger to depress all the way. After 50-70 pumps the strut hadnt gone up a bit. I was exhausted and gave up. There were also air leaks from the factory installed fittings at the base of the unit making it less effective. The aircraft was a twin so heavier than a single. That may have made it harder. I would return it but it got scratched up some trying to make it work. Should have got the 15:1 strut pump.