I also grabbed one of these from the local Home Hardware the other day on a whim, I'll test it out and let you know.
The Esbit tabs are excellent emergency fire starters/fuel, but while combusting, it was probably in my top 3 worst smells I have ever experienced in my life. Absolutely horrible (and very toxic: do NOT inhale). Also, if you plan on cooking something using an Esbit-burning stove (even if you just want to boil water), be prepared to deal with some very sticky, gross residue on the bottom of your pot. Good times
On a more positive note, look up the history of Esbit fuel (you'll also learn how the tabs got their name). And for anyone who's still interested in this particular stove and fuel(!) Lee Valley also carries them.