Pros: Bulb Durability, Battery Life, Durability, Brightness
I'm like the reviewer above and have these little lights stashed everywhere: all the cars, night stands, kitchen, tool chests, bail out bag and my tactical duty call out bag. Seeing that they run on only 1 AA battery should be clear enough to let anyone know this light isn't made to compete with a Sure Fire etc. and I'm sure it wasn't meant to. What it does superbly though is light a map or compass, show your way in a dark stair well and a path in the woods without blinding you. If you're looking for a high powered 'tactical' flashlight or a light that is so bright it lets people know where you are from a 3 miles away, you definitely need to look elsewhere, but if you're looking for a little back-up light that you can stash anywhere and everywhere, and weighs next to nothing, you will love this little light!