The esbit tablet stoves? I have, but it's been a long while. From what I recall they did a fair job cooking, but much slower than a canister stove (alcohol is also slower). They leave a ton of soot and residue on your pot. The tablets have a strong odor. The alcohol stove can run on any liquid with a high alcohol concentration. Fuel is available at basically every has station in the form of fuel de-icer.