Mini mags are best when you need a strong but small light in a bit wider beam than the Princeton Pulsar.
Takes easily replacable batteries that are easy to get and has a sturdy metal casing.
Still light enough to dangle off keyring.
I currently have this, a pulsar and mini leatherman attached to my keychain and still manage to carry everything fairly comfortable in my pocket, satisfying my inner survivalist instincts.
Mini Mag fits well in the cool tool group.
Only minus point is that if I have the light attached to keys for too long without checking, it loosens up where you attach the batteries and finally comes apart.
I ended up loosing the light and the battery casing and realised that I only have the keyring bit left.
Never mind, still the coolest small torch I have found, I just keep the battery attachment closed properly from now on.