Reliable sources have reported that the knives are nice... but they're not worth their price. Most believe that you can get a comparable knife for a lot less money -- albeit without controlled blood splatter -- elsewhere.
The really big problem that the knife community has had with Dark Ops has centered around their outrageous advertizing which is in many places absolutely fiction. The most patently egregious example being their claim that a special coating makes their knives invisible in the infrared spectrum. Overall, their advertizing is downright embarrasing to the knife community and contributes to the public image that all knife collectors are armchair Rambos concerned about controlling blood splatter in covert deanimation operations.
The whole ad campaign makes it utterly impossible for a civilian to carry one of these knives. If you were to -- God forbid -- have to use your knife in a self-defense situation, the prosecutor would have a field day in front of the jury discussing your mindset and motives. "Ladies and gentlemen of the jury, the defendant had told you that he carries a pocket knife for opening boxes and trimming loose threads. He claims that circumstances forced him to employ his knife in self-defense that fateful evening. But the knife the defendant selected to carry with him on the evening that he killed the deceased is not sold for cutting loose threads. No. It is specifically designed to penetrate BODY ARMOR!, it is intended for "deanimation," to KILL! The State contends that when defendant went to the Club Foot that evening, he wasn't worried about hanging threads. He was worried about BLOOD SPLATTER!, specifically, the poor departed's blood..."
It's just the kind of image of a knife owner that we all cringe at and that many of us have invested considerable effort to assuage.
Add to this the blatent and shameless copying of ER's designs, and it's just all to much to bear.
The bottom line is that the knives are well-made, but they're not all they're cracked up to be and you can get many other knives just as well-made for substantially lower prices.
Imagine someone trying to sell you a stock Honda Accord for $50,000. It's a nice car and, by all accounts, well-built. But that's about twice the price it ought to be.