Old post I know but, I do have an answer. Both of my accurate ones are rather energetic, sometimes they don't lock all the way when you open them pointing straight up. They lock just fine from just about any other angle though. They are very easy to modify, you just unscrew the plug in the bottom and the spring will fall right out. You could put a more powerful one in in no time. The blade is pretty sharp for a stainless knife. The only downfall to it, is the button/locking mechanism. It's made out of brass and I've already torn up part of one. As long as you don't go stabbing crap a whole lot like I did (no people... yet:lol) then it should be fine. It's decent for cutting, about as sharp as most cheapo small folding pocket knives. Not anywhere near a Smith and Wesson or a Ka-Bar or Microtech though but, what can you expect from something so cheap?