I tested it at off the tracks this weekend, and here is the verdict:
Being able to go off wooding in the morning, and pretend you're all healthy and living on site etc: 10/10
providing the campsite entertainment while everyone gathers round going 'ooh what's that then' 10/10
quick boiling, 8/10
not being able to work out how to lift it up and pour water into the cups because there's a load of fucking fire underneath and as soon as you lift it the fire will fall out, 0/10
having moose warm up your food in the campervan for you because your volcano kettle is basically made of fail, 0/10
So, there you have it.
(with hindsight, we could have just picked the kettle up and whacked the balti dish straight on the fire bowl, which would have solved both problems... )