I've had some Web-Tex kit in the past, and apart from the "paracord", which isn't the real thing, but is dirt cheap, I can't recommend any of it. A couple of guys I know who are cadet instructors have said pretty much the same. I have a friendly local surplus dealer who is of much the same opinion, who reckons its OK for cadets, but not for serious use. I haven't seen the combat knife, but if it's anything like the other stuff from them I have seen, I'd say don't bother.
Alan