I'll admit to ever using one but dont see the need when you buy a couple firebricks and bank to one side using the minion method or using the snake. Or you could build a mini wsm.
I've used the smokenator, really works well if you have the rotisserie on the kettle, for chicken, you can actually get edible skin, I use 45 brics w/12 lit in the chimney, couple chunks of pecan.