I haven't tried all the stoves but I have tried (and bought) a Bushbuddy. (I am not connected to selling them).

They are easy to light and don't required special fire starting fuels or consideration. They can burn anything (wet pine cones lying around, wet twigs) and they are fantastically efficient.

I can boil a small pot of water in less than 5 minutes (from the time I light a match). I have conventional fuel stoves (white gas) that can't do that. They produce almost no smoke (once up to temperature... say after 90 seconds or so) and the container doesn't get hot enough to scorch anything touching it. This includes leather gloves etc.

I've cooked up dinner in places where I would NEVER consider starting a normal fire -no matter how small. This is because the fire is totally contained (with only the danger of sparks depending on the wood you use) and the actual amount of burning material at any one time is tiny. This allows the location of the stove in areas where a fire would not be practical (or where a fireproof campfire base could not be established and there is a risk of forest loam catching fire).

Other perks are 1) It is incredibly light.
2) It fits perfectly in a titanium container (see their website).
3) The container can be inverted to snuff the fire out or create charcoal for future use.
4) It can be used in areas that prohibit campfires but permit the use of stoves. (Which includes setting it on my back deck and preparing a cup of tea).
5) Once the fuel is consumed the coals will still provide intense heat for 5 minutes or so. Perfect for 'cave man TV'. Looks just like staring into the coals of a campfire (obviously).
6) There is almost TOTAL consumption of the material. All that is left is ash (fine white powder). I was most surprised by this. I would never expect that I could scoop up and feed wet pine cones and the stray leaves on my deck and achieve 100% combustion.

I give this stove an A+. Perfect for emergencies, camping and survival camping (when you need to be sneaky and keep smells, smoke, and visible fire to a min.)

Again, I don't have anything to benefit by endorsing them. It is just rare that I'm impressed by a product.

-NIM