For a while I was trying to decide between the Tenacious and this; I eventually picked the Cara Cara 2 G-10 (and technically I still haven't ruled out the Tenacious for a future purchase). FINALLY got it today, and I have to say that I am REALLY IMPRESSED!! Definitely large (I choke up at the finger choil, and my full 4-finger grip comes to across that fourth pin -- then again, I have small-to-medium hands) and heavy (at 4.25 ounces it weighs more than my other two Spydies -- a Cat and a Squeak -- put together), but I'm very much surprised at how THIN the knife is (need to take the calipers to it, but I'll be surprised if it's more than 11mm, or .44 inches) (EDIT: Took the calipers to it -- turned out to be about .425 inches thick at the scales.). Clip works very well (and I'm not moving it from "right-hand tip-up"). Blade came out of the box hair-popping sharp, and AFAIK no blade play (up/down or side/side) when open. Blade isn't perfectly centered, but that doesn't seem to affect deployment (EDIT: Just a little bit of tightening at the pivot, and now the centering is perfect!). And I love how the spring tension in the lockback keeps this blade closed -- no worries that it might accidentally pop loose and give me a nasty surprise when I try to get it (for future reference, my type is A-positive).
My first byrd knife. CERTAINLY NOT my last. And, if anything, it's just whetting my appetite for even MORE Spydies AND BYRDS!