If I was just going to have one knife or a few even, I might go along with that whole "always buy the leading name brand and nothing else" logic. I don't though. I have more knives in my collection than I can even count without spending hours gathering them all up. I wanted a real Scarab. Sure I did but wasn't about to pay almost $600 for one if I could get a cheap copy for $75 that worked at least close to just as good. I've never had a problem with my replica knife and I have obviously carried it quite a bit to wear the finish off it that much. It always opens and closes with plenty of snap to it. I haven't tried burying it in the sand or mud and trying to get crap all in it, but it's been dropped on dirt, sand, and rocks, concrete, in the pond, thrown around and everything but hasn't required disassembling to clean. I could buy half a dozen more for the price of just one original so IMO they really aren't worth it just for a novelty item. I'd buy a brand new Glock 19 first and still have money to buy over $200 worth of ammo.
Gunfun I'm not sure if you meant that the way it came out but OTF knives, at least all the ones I've seen, are double action so they close with a backward pull of the fire button.
Speaking of strong springs and name brands though, I'd like to add the strongest spring I've ever seen on an OTF style was back in high school. I guy in the class above me had one that would pierce a car hood. It was not even any name brand. He made it himself or with help. It was more of a spike really and built with a very heavy spring inside a tubular handle.