I have one and I like it very much. It is the closest thing to a Surefire 3P that you can get. Get one. Very well made. They accept the P60-type drop ins. You just have to take apart the bezel (it is two parts screwed together) put the LA in and screw it back together. The lamp that comes with it is well made, but not very bright, even with a new cell in it. I threw mine away as I found it to be useless compared to the drop-ins. It is a single cell light, but if you get the Lumens Factory 3.7v P60-type Lamp along with a RCR123, you've got a great little light. Only downside to it really is it has a plastic window, so higher output incan LA's like the LF LA I mentioned above should probably not be used for extended runtime as the plastic will probably melt. It also will take LED drop-in modules used to replace the P60 LA. (best to use instead of incans) The tailcap is a forward clicky, very quiet clicky, and very reliable from my experience. The tail end can use SF tailcaps from the P, C, M series SF's. The M1's tailcap can be used on the aforementioned SF's as well. You can put a 1 cell extension on from SF to make it a 6P if you want. A very good little light overall that plays well with others.