Seems priced right to me relative to other gravity charcoal machines. Sure it's small, but if you're cooking for just one or two, or if your patio is similarly small, it might be just right. And it's portable...think weekend camp-outs...that can be important. My size beef would be the lid height. You can do a rib rack or tri-tip, but not a roast or butt...guess you cut them in half. But life is compromise.
But it doesn't hold much fuel. I see no claim of cook time per fill at typical smoking temps. The whole point of a gravity machine is to do long charcoal-based smokes without fire-tending. If it can't do that, I'm not sure the benefit over a small $40 charcoal grill with starter chimney?
Glad it comes with a power cord. Hard to believe the 4 AA batteries are going to last the claimed 16h. If you're really taking it camping, better bring fresh batteries each time.