From online reviews, I got the impression that they are durable, and I bought 10 tubes of them. They fly consistently, and their speed is fine. However, on average, they barely last one game. Are they supposed to be not so durable, or did I get a knockoff?
I bought a tube to try out. I don't like how they hit, but having said that, they don't die as quickly as you're experiencing. I think you might have gotten an old batch. Try humidifying them and they'll last longer.