I have one with a reflector and a two stage tailcap clickie. If it's the same as yours, it's a nice light, but I really prefer the 3w 2x123 I got from them, if just because of the size factor. According to a salesperson I spoke with, they won't be carrying these anymore, and I haven't seen either one since before Christmas. I bought several of the 3w versions for gifts and wish I could find a few more locally. If you've got a different version, let me know what it's like. The two Guide Series branded versions I have are nice lights for the money, and I'd be interested in any new(-er) versions.
To improve the grip and the comfort of carrying the 5w in cold or wet weather, I wrapped mine in friction tape. Cheap fix and it works well. I keep mine on a lanyard (one of the coiled key keeper thingamabobs with a clip on one end and a keyring on the other) and carry it in a Nite-Ize pouch with the lanyard clipped to that -- for me, it's too big for comfortable pants pocket carry.