I've never used an Esbit stove, but another option that was mentioned above, in passing, is an alcohol stove. They are simple to make, work great and are clean burning. Actually you don't even need to make one, you can just use an empty tuna can or cat food can. Pour in a little methanol, and you can boil a couple of cups of water in 5 or 6 minutes. The best fuel I have found readily available in the U.S. is gas line deicer - the yellow bottles of HEET, or similar. Buy it in a auto parts, hardware, discount or grocery store, all much cheaper than at a gas station! Make sure it says methanol, burns cleaner and better than the red bottles of HEET. It is better and cheaper than denatured alcohol as well. Easily carried and does double duty in your vehicle in winter. There is a little odor, so make sure you use it in a ventilated area, but I don't think it is as smelly as Esbit tablets.
See my review of a simple soda can stove here, which also has a link to show how to make them:
http://www.spgear.org/reviews/3374/Soda-Can-Stove.html
The soda can stove in the picture is one I have used for about 6 years. The tuna can stove has holes punched in it with a paper punch, and then you don't need a pot stand. BUT make sure you don't use this in windy conditions without a large clear area or on a fireproof riser. The wind will blow through the can and flames will shoot out about a foot on the other side! Best to use a windshield with both of them.
Vic