Every single one that I know personally, that has had one, including mine, would fail and often. I don't usually try to tell anyone not to buy anything, even from hatsan as I do like some of their rifles. But this one is not it, please do yourself a favor by not wasting your money on one, and instead getting a notos. It is regulated, it has a smidge, more power and it gets about as many shots, plus if down the line you wanna customize it, you can.There are plenty of threads on this forum of notos being customized.
For me, sometimes it would not want to take in air. I would have to fill it with a tank while shooting it so that the valve was actually shut and Phil. Sometimes it wouldn't even allow me to fill it when I was doing it. Also, with mine, I had to clean the barrel every eighty shots or so, which tells me that the barrel needed an extensive polishing. I was not putting in the work into a budget backup gun. Accuracy was subpar, when I first got it, I thought accuracy was okay, but later on I got a notos and I realized that the accuracy from the jet was entirely subpar.