I prefer a frame lock any day of the week, but unless its a blade that requires a lot of torque or striking from wierd angles (like say a karambit) I'd trust a nice solid titanium liner.

Most of my regular folders are liner locks and, although admittedly I very rarely do anything with them I would consider *hard* use, I've never had one fail.

i carry one of decent quality at all times; i also cary a fixed blade at all times. i think you hit it correctly when you asked about quality being an indicator of whether a liner lock was solid--my answer to that question is gotta do it sorry WELL DUH any decent knife of any configuration will be just what it is a fairly decent blade, all depends on what your using them for. don't hammer on the f....er what i have is a little 3 inch blade light weight cheap gerber twenty bucks i love it use it for all general use nice toothpick even did a deer with it (woman in front hit it, i finished it and took it home) it's $20 i'll never miss.