This is the only Big Jack I picked up from the new run and I have to say that I really like the single blade version. It is slim enough to ride in my back pocket and not feel bulky, but is still a substantial knife. I have a two blade version from 2014 and there a marked difference in the girth. That one is usually carried in a CK leather clip slip.
Construction nice and tight with no gaps. Pull is a bit hard at almost an 8, yet oddly there is a soft closure with little snap.
Blade very sharp as have been all of my recent GEC knives. I stropped it a bit and it has a fine edge for what light cutting chores I do.
I really like the spear blade and the long pull.
Nice deep jigging. Dye is a little pink to white on the corners of the pile side, but that's okay. I'm thinking it's more of a strawberry than blood red.
In short, I like this knife a lot and it will see plenty of carry time.