I'm not sure if this has been reviewed already, but I've been carrying this one for a while now and I really love it! It's basically a fenix copy, but with many improvements. First, it has a momentary switch. Press to get momentary, click to turn on. Loosen the tailcap and you get the lower level. I do wish the lower level was a little lower, but it's okay. I heard that some users had problems with the switch. Apparently the contacts get dirty and the two stage stops working. I thought this happened to me, it turns out that this little silver ring was keeping the tailcap from tightening sufficiently to access the high level. I took the ring off, and zero problems. A few nights ago at work I was bored so I decided to put it through a mini torture test. I turned it on and completely submerged it in a cup of water and stuck it in the freezer. A few hours later, the water was frozen, and the light was still on. No condensation under the lens, no problems. I smashed the ice off the light, the light functions flawlessly. One of the things I really like is that you can easily access the emitter. The head unscrews, and the emitter's right there for you to upgrade. The heatsink is also easily removable. It's just a nice well thought out light. I wish Fenix had gone this route instead of the multi-level/function path.