I am always on the lookout for new better approachs, currently I use an Irish made – KellyKettle – and after several camping expiditions and uses I am quite happy with it. This Rocket Stove takes advantage of similar principles of heat, air exchange to work and is easily compact as well. My Kelly Kettle works with all of my cast iron cookware – however, I can easily see the overall net benefit of the rocket stove approach.
A solid design, and remember, you can dig a rocket stove if you dont have any of the above. – A knife really is all a woodsman needs if you practice enough, and even that, is quite easy to substitute in a pinch.