Bought my 561 a couple years ago, and still love it. It's got a couple scuffs on the blade being I actually use it, but no functional problems at all. It always flipped smooth, but took a bit for the detent to wear in a bit so it would open with the studs, and the lock bar was sticky for a couple weeks. Probably the best handle shape there is to control that nice big blade, and the KVT system is flipper perfection. Elmax is a good balanced steel, a decent step up from S30V in my experience. It takes a really fine edge and holds it well, it never chips, only rolls or dulls, and is very stain resistant, sharpens way easier than you would expect given how long it keeps a fine edge. The trick is to strop it before you resort to sharpening, it strops better than any other steel I own, the edge comes back several times, and it's relatively easy to straighten out being no metal is actually missing, it is only "dull" from small rolls, and not actually worn or chipped where metal is missing and sharpening is actually needed.