It seems like the best way to simulate a wok burner. It was nice and hot right on the bottom as it needs to be.
Downside is, that once it is raging, there is no turning it down. I've got two wog rings, used one on the grate above the vortex and one to set the wok on the side.
Be sure to have everything ready to go in before you start.
I've also heard of, but have not tried, setting a wok on top of a chimney. I suppose you wouldn't want the coal higher than the top row of side vent holes.
A pair of charcoal baskets may also work, although I would think the hot spot would start to get a little large.
I was hoping the the gourmet grate would make a nice ring. The wok sits too low in it. Even if it worked, I think a vortex underneath wouldn't work and you could not have a high heat spot in the middle.