Most helpful critical review
beware the storage cap
on June 2, 2015
The cap on the little storage compartment falls off easily, especially when you have added greased tinder inside the compartment. Also that cap is attached to the string, which makes it even more likely it will fall off.
The intent seems to be to tighten slack in the string with the slip grommet to keep the cap from falling off. Even then you are relying on this cinching to keep the cap on while this string may be hanging off of something else. The cap seems designed in the lab and not tested in the field very well.
The sparking mechanism is fine. You can start a fire with it at least.