I'll give it 5 stars for the sake that it fully accomplishes it's intended use, a key chain light. I ordered this to use with the included clip in the pocket rather than on my keys (I hate bulky keys). I love the shape. The flatter, wider profile lend very well to pocket carry. I worry the light might come loose from the clip though, only time will tell. The buttons are very easy to use but turning it on takes a couple seconds. This makes sense for a key chain light but not as great as a pocket light. I don't see how I could easily turn it on in the pocket but maybe I would have had it instantaneously turned on. The output is really fantastic for such a small light and it throws a nice wide beam, really good for general EDC.