Summary: I purchased my first one and it has come in handy more than I have thought. Purchased one for my wife, and she's not one for nick nack items, but she did admit being useful. We keep these one out key chains so it's always w us at all times.
Summary: For a flashlight of this size the 10 lumens performance is unparalleled! I own several and the quality is outstanding. I clip them to the lanyard ring on my Swiss Army knife and mini multi-tools. They are also handy clipped to the zipper of a backpack so you don't have to fumble around in the dark.
Summary: Great for jackets, especially for kids. I have several that I use for fishing vests, hunting clothing and general use. Cons: Batteries are spendy...got to remind the kids not to play with them :)
Summary: Going to try the Key Mate which sounds like it has a better switch. This model, attached to a key ring, would frequently light up on it's own in my pocket or even completely unscrew and dump the little batteries.
Summary: I wanted to love this, but the case design is poor: it repeatedly unscrews itself while in a pocket or backpack and the tiny, tiny batteries and little screws fall out. I've recovered the parts 2x, but finally lost enough parts so that there's no recovering function.