I have one. It's fantastic. It sets up in a breeze (there are slots you just stick together and voila!) and actually boils water very quickly with very little wood. You can gather all the wood you need to boil your coffee water and cook a pot of noodles in a matter of minutes. Gather some tinder, lots of twigs, and some nice, long sticks (a foot long or longer, about finger thickness). Use plenty of sticks about pencil-thick until your fire is really going, and then you can start pushing thumb-thickness sticks in the port which can be infinitely long. You don't want them too long, though, because you might want to set your stove on a rock or something (and you don't want to accidentally kick the sticks and make a firey mess). As they burn, you just push them farther in. I'm making it sound complicated, but it's really easy.
If you are going to get one, may I humbly suggest spending a few extra bucks and buy: A) the titanium version, B) the optional carrying sleeve, and C) the titanium adapter. You will not regret the few extra bucks spent. The carrying sleeve is a very tough, black plastic that protects the packed stove *and* the other gear in your pack (because the edges of the stove are not very smooth... not sharp, but certainly not smooth). The titanium version weighs SIX ounces less. That is hugely lighter in the same tiny footprint in your pack. And the adapter lets you put narrow cans and cups onto the stove.
The emberlit stove is so small, light, and easy to use, you just stuff it in your pack and go! It literally takes no space since it's flat.