I have had a Spyderco Endura for at least 8 years now, maybe longer. It has lasted very well with no malfunctions or breakages, although the paint has worn off the pocket clip.

I have been quite well satisfied with Spyderco and if I ever manage to wear this blade out I will gladly buy another one.
I am seriously considering buying one of the Doug Ritter designed Benchmade knives too.
When I look at the price over time they are dirt cheap if they stand up as well as my Spyderco has.