Lost J,
I am not a lefty. The liner lock is STIFF when new. I chewed up my thumb a little bit until I got a bit of a callous there. This is a stout knife and the liner lock is no exception. Now that I'm used to it, it's not bad. I've had a couple of other knives (Gerber and Kershaw) that had comparably 'easy' locks, that took less effort to unlock. I'm not sure easier is better.
SP