The BK2 is an absolute tank. I've had mine for a couple of years, and beat the snot out of it on a regular basis, it still looks almost new. It has one of the thickest blades around, and the steel is a nice alloy for what it's designed for.
I like the feel of the stock scales, the palm swell fits my hand very well. The scales are a bit slippery if you have wet hands, many people swap out the scales for Micarta ones, or cut ridges/jimping into them. I've never really found it necessary though.
The stock sheath is good, it has very good retention, and multiple mounting options.
I only really have two complaints about the BK-2:
The frog could be a bit better as the knife tends to flop around on the belt, so if you're belt carrying a lot I'd recommend getting a more rigid replacement.
The spine is almost too thick. I know this is designed to withstand the American bushcraft obsession with Batoning, but a quarter inch thick blade is insane. If it had a full flat grind, it may be a little easier to handle, but for deep slicing it's just too wide. It does make it insanely tough though!
I also have a Glock field knife, which I tend to carry a little more than the BK-2, simply because it is lighter when out hunting. It's also been a really great knife, I've had it for ages and use it hard. Around camp though, the BK-2 is hard to beat!
Cheers,
Alex