Hey cziv! me again trailing one of your comments. Seems like we've subscribed to some of the same threads!
I've got about 50 or 60 knives, 99% being from brand name reputable makers including RAT/ESEE, Fallkniven, Blind Horse Knives, Victorinox, Wenger, Spyderco, Benchmade. Some of these are 10+ years old and in great condition because I tend to take care of and am very careful with them.
That said, I'll admit that I recently purchased a Sanrenmu / Navy K615 when I read a post here by a highly regarded/reputable forum member (I think it was Esav Benjamin). His post piqued my curiosity about these so I figured I'd try one to use as a beater/back-up car blade, and I have to say that the K615 is pretty well made. So much so that I just ordered several more Sanrenmu/Navy models just to check out, and to have as beater/loaners/travel knives where I don't want to risk losing or damaging my good knives. I've seen and heard too many horror stories, as well as experienced one or two of my own, of non-knife users damaging higher-end knives doing stupid things. I just consider these as beaters and decoys for the real thing.
Sure some are pretty close copies of other knives but IMO this is nothing new and has been happening forever. For example I read recently that Nikon's early cameras were Leica knock-offs, and Canon's were Zeiss knock-offs. They got popular in North America when WW2 soldiers, returning from Japan, and couldn't afford hi end Leicas, etc, bought these then much cheaper "knock-offs" to bring back home with them, and the rest is history.
My boycotting of these "knock-off" knives will have no effect on their success or failure, but they'll allow me to have more knives for certain situations. As long as they're safe to use, and less damaging on my wallet, I'll probably buy them occasionally. That said, I will continue to buy my brand name knives of preference.