The Featherlight one-hander was the first knife I ever purchased by mail order, and it was before I knew I was (or was shortly to become) a knife collector. I had owned a Spyderco Delica, a couple of swiss army knives, and a Buck Esquire before that.
The Russell was, at the time, the sharpest knife I had ever encountered out of the box. The thin blade (mine's AUS-8) adds to its cutting ability. This was my favorite knife ... until I started buying more. I still carry the Russell from time to time, but it's not my first choice.
I never had a single problem with the lock giving way; in fact, I couldn't figure out how to open it one-handed until I asked A.G. in an email. It was stiff.
For the price, it's a great knife, if you want a lightweight knife. If you want something heavier at the same general price, chekc out the CRKT Mirage.