It includes a whistle because it's trying to be many things to many people.

I checked this out at REI just the other day. None of the light modes is very bright but I suppose that is a fair trade off for more modes of operation vs. chem. light sticks.

AG13 batteries are sure to be harder to find but are small enough to store away many spares without using much space.

Overall, I'd consider it an acceptable backup to a backup, but certainly not an acceptable primary light for a preparedness kit.

For the price, they make great giftsfor kids past the "choking hazard" stage.