For several years a while back, the frn Endura was my outdoors work knife, alternating with a Griptilian. For the last few years my work knives have been the Recon 1, alternating with the Ultimate Hunter. The Cold Steels have lasted longer and seem more suited for hard use.
Two of my Enduras developed lock rock. When one was sent back to Spyderco for correction after a phone call to the company. It was returned to me with this message, ” Enjoy your well used knife”. No change in the back and forth lock rock.
My Recon 1, and UH, still lock up like a vault. With the build quality, knife steel, and ergonomics, for a relatively low price, the Recon 1 and UH are great values. With both, I was able to easily loosen the clip a bit by bending it very slightly with some needle nose pliers, while holding the upper part of the clip with my thumb. Now the clips work fine.
While I still have a warm place in my heart for the Endura, and for Sal, I know what the better knife is. Get the Recon 1.