Button locks seem to show up more often on cheaper knives than on higher end ones, which is sad, as cheap button locks usually have up/down play and don't feel all that secure, while higher end ones, like Hogue, are rock solid. My first button locks were cheap ones and I didn't really care for button locks as a result. I was actually hesitant to drop the money for my first Hogue button lock, but once I had it in hand I was very impressed. I now have seven of them (like potato chips, you can't have just one Hogue ). I'd love to see more higher end button lock knives.