Was pumping up the tank for like 30 minutes until realizing the fitting on the hose from factor has a slow hiss. wasted so much time on that one. One reviewer returned theirs as it was a lot of work. That is SO TRUE. To get a small tank up to 200 bars, that was around 300ish pumps. Had to stop and take a break every 20 bars. From 200+, its about 5 pumps for 2 bars, 50 for 20. And on the down stroke, you need to really lean into the handle with all your weight. If you are under 200#, this will be a struggle for ya. I gave up at 260 bars. was too painful for the paws. Started looking into ordering an electric pump. This guy will be a good backup but seriously! way strenuous!!