I bought one a few years ago and was looking to pick up another since it seems I've lost mine, and I noticed there's no review, which isn't surprising given that there's really not much to say. It's as simple as clipping your keys to your belt loop, it functional, it's cheap enough to just add to any order, and if the included carabiner ever gives out I have plenty of extras laying around.

So for me at least I feel it's worth it, especially considering my past experiences with my throw popping put of my pocket and hitting the groun. Just the other day I had one pop out my jacket and roll right into a puddle of course, so yeah I've grown to appreciate having one. =]