I have used many OTF autos before moving to Denver. My experience with the double actions is they are more fragile than I desire. I carried the Benchmade Infidel when they first came out and I kept having to reset the blade with any use. I shifted to several Microtechs and had similar experience. I will say the single action Microtech Halo V is rock solid, but you have to manually retract the blade when you are done. Just my two cents on OTF autos.