This exact knife was the first Spyderco I bought, 6 weeks ago ($86 total at NK-the best price around then). I have 3 other spydies now and another to arrive tomorrow (beware), and this is still the smoothest operating one. It's a great all around utility knife for EDC, but some probably find it a little heavy. The serrations can be useful, but if I had it to do over again, I would have bought one with a plain black blade. The light wt. Manix2 would be a good choice if you think the regular one is too heavy, say, for dress clothes
but it cannot be totally disassembled, probably not a problem.
My favorite now is the much bigger Manix2-XL with plain black blade, which I think is very similar to the original Manix only with the ball bearing lock, which is amazingly smooth to operate.