Well, I had complete catastrophic failure using a stinger yesterday. Man was I bummed. I had been in the stand for hours (first time in the stand this year), hadn't even seen a pesky squirrel. So just before dark I pack everything up, and as I begin to start climbing out of my stand, I see a nasty 'ole cottonmouth slithering towards my ladder. I caught him about 1 inch behind his head, and if it weren't for the tiniest piece of skin, would have been a perfect decapitation. (This had to be my best shot ever, instinctive aiming at it's finest!) The bad news though, is that my arrow penetrated about 3 inches into a gnarly old oak root. Talk about performance! I even easily pulled it from it's final resting place... minus any part of blade, and only half of the ferrule. I know it's no real test of penetration, but I was impressed to say the least. Thank heavens for their warranty.