This looks really interesting as a patrol-sized wood-fueled backpacking stove. I have the smallest model, which is great for one or two people. This is sized for more people and should work great for a Boy Scout patrol (around eight).
The design is about 7″ in diameter and about 9″ tall. That is roughly the size of a squared-off gallon milk jug, if you make a cylinder around the outside edges. It weighs two pounds, which is substantial, but not bad for a stove to feed a patrol. Remember, no fuel weight, only firestarter material.
If the milk jug analogy doesn’t work for you, it is smaller and lighter than most bear canisters. It would almost certainly fit inside a BearVault BV500.
It is also smaller and lighter than any synthetic sleeping bag. For example, the Cat’s Meow from The North Face is 2 pounds 10 ounces, and packs down to 8″ in diameter and 17″ long. The Solo Stove Campfire is an inch smaller in diameter and half as long when the fire ring is inverted for packing.
This is a “wood gasification” stove, with air feeds at two levels to promote secondary combustion and efficient use of the wood. It can be a real blowtorch if you need that, or you can moderate the heat by limiting the fuel. You get it started, then keep feeding it small stuff. The shell and bottom stay cool because there is outside air drawn in at the bottom. No scorched fire rings, and just ashes to dump out after it is done.
The Solo Stove Campfire Kickstarter level to get a stove is $99. Very tempting. I’m guessing it will be about $120 once they get to full production.