It's basically a brass version of the Spark-Lite. I use a Spark-Lite and it's amazing, a top notch piece of gear. There's also an all-alluminum version available that has replaceable flints. I agree the brass TAD version is cool but operationally it appears identical to the Spark-Lite. The main appeal would just be that it's maybe sturdier, but of course at the expense of being much heavier.
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“I'd rather have questions that cannot be answered than answers that can't be questioned.” —Richard Feynman