I just received my brand new MC13-D last week, and I must say that I really like it. This is my first non-Spyderco knife (unless you count my old SAK), but it's definitely going to be my EDC. The damascus blade and ebony scales are a lot more classy than the Manix or Native I was carrying. Since I'm about to start a new job at an office (rather than being on a receiving dock), I figured it would be a good idea to have something a little nicer. I also thought I'd treat myself for a job well done.
Anyway the knife is as sharp as any of my Spydies right out of the box, and the action is nice and smooth. I only have a few minor issues with my Mccusta right now. First, I'm not used to tip-down carry (very minor issue). Second, the blade grind is slightly uneven, especially near the tip. Third, the blade is not centered in the handle when the knife is closed. This is actually my first liner lock, so I don't know if this is normal or not. It's very close to contacting the liner in the closed position, but it isn't quite there. If I tighten the pivot screw at all, the knife becomes hard to open.
That said, I view my few issues as minor, and I really think that Mccusta knives are a fantastic deal. I'm certainly happy with mine, and it's a great addition to my small collection. I would definitely give the company my stamp of approval.
edit: Oh yeah, I've been reading for a long time but haven't really had a subject I could offer anything on until now. I've been learning a lot, though.
