I've made a few for friends and relatives. I am making my first hidden tang now for my daughter for her first deer hunting trip this fall.
The Exo850 was the most time consuming. It started life as a 1.25" round bar of A2. I am a stock removal guy, not a forger, so I cut away everything that didn't belong. Instead of the tang being in line with the blade, I ran it as kind of a spine over the back of the handle and the pins run through the spine and the handle material. I will make 1 more, for my dad. It was a major pain.