Same here, I've had a Spyderco lock back of some sort since the mid 90's and never had a single problem. Also at the same time I bought mine 2 friends picked up a lock back Spyderco, one Delica and one Endura. The guy with the Delica is still using it, although he is pretty easy on his knives, with no problems. The other friend was really hard on his Endura, it was his ONLY pocket knife for around 7 to 8 years. He carried it every day all the time and anything he had come up the Endura got the call. He was a volunteer Fireman at the time and a Police reserve officer so he used it pretty hard on the job as well. I know he broke a pretty good amount of the tip off once and then he let someone borrow the knife and when he got it back they had used it to try and fix some wiring on a fire truck and somehow it got a big chunk burnt or I guess melted out of the edge. He was also a hunter and used it for his deer needs as well. He eventually lost it in a house fire. I said all that to say this, he never had one failure or problem either.