HJ,
I got my first Esbit from a Brit officer while I was in the service - seemed more rugged and better made than the commercial ones. The ones I have (or think I have now) are the regular size, the pocket size and a "flat" one that I used to keep in a flight survival kit. Used the regular one (it seemed to be the best of the bunch) for some work in Wyoming during the dry season where open fires were a no - no. It was never a favorite because of the fuel, Esbit tabs or GI tabs. I went back to my 123 and put them away. I bought the Ti Wing from WetFire in hopes the fuel was better (and I love little light things that work). Tried it a couple of times at home and went back to my Pocket Rocket.
I guess that nothing is as good as some pine squaw wood for boiling the noon kettle, but there are lots of times and places it is not acceptable or practical. I keep thinking of trying a Vargo Hexagon -it might be a cleaner way to go.
Respectfully,
Jerry