I'm a big fan of the John Wayne can opener, and have at least a dozen scattered about my various kits. I've found that after using one a few times, the blade doesn't stay folded. this wouldn't be too much of a problem except the one on my keyring tends to get snagged on stuff. Until now i just dealt with it, but a few minutes ago I cut my thumb open on it. So i just thought i'd give a heads up to all those who have one on their keyring.