I have a Mini-Dinka. Mike is a super great guy to deal with, and his knives are definately tough.
I do feel obligated to say this though: The thickness of the knife does inhibit the ability to cut. The edge on my Mini was very small, and at pretty bad angle. Now, for a knife that is only four inches or so long, I would expect a bit more edge and a bit less mass on the blade. Not so on the Mini, though ultimately it wasn't a bad thing. I bought a Smith sharpener, and when that didn't work (everything on it was fine or ultra-fine grits), I started looking around and found EdgePro, and so I saved up and bought an Apex.
I spent an hour last Friday thinning out the edge a bit (to around 20 degrees per side), which did the trick, it is still a little beast, but is sharp and can cut most of the stuff I need it to cut. And, it is still a fat blade so I don't have to worry about the blade snapping when I use it to pry stuff at work.
It is still, well, rough. The scales don't match the tang, the grinds are uneven and not really in line with the handles (it is slightly hollow, though it doesn't really affect its performance for the things I use it for). The roughness isn't bad, it "mellows" the more you use the knife