I want one. I used to think they were silly, but now I realize that they are nothing but a permanent campfire. People love to assemble around them, the smoke keeps bugs away, and they are great for burning marshmallows.
And if you go pagan, you can put burnt offerings on it too. It won't hold an ox, but perhaps a goat or unblemished lamb.
I am planning to double the size of our cramped bluestone patio and already know where I want the fire.
This excellent specialty lumber place on Cape Cod, Stonewood, will deliver the cut stone on a pallet with the insert, ready for simple assembly. No mortar.