I got the L1C in the three mode (no strobe or SOS) version from Tactical HID. It came with the usual accessories: spare o-rings and switch cover, lanyard and holster. Quality seems very high; anodizing is flawless and the SS bezel and tailcap ring are nice touches. Knurling is well done, but I would prefer it to be more aggressive. I also got the tail-standing accessory, but I haven't figured out how to remove the SS tail ring yet. It's on tight and it's slippery!
This is a very bright light with a well defined, fairly tight hotspot and a useful amount of spill. I would say it has more throw than most lights of this size, and for a light with a smooth reflector there's not much to complain about regarding rings and artifacts, or odd tints. Just a barely noticable donut hole if you're white wall hunting, but not noticable at all in regular use.
I like the simple UI and limited modes of the version I have. The memory feature works as advertised, it always starts out in the last mode you were in when you shut it off. The push button seems OK; not Surefire, but more than adequate. The clip is really nice. It's held in place by screwing down the tailcap and has the perfect amount of tension. Plus it's a 2-way clip so you can clip the light to a ball cap. As far as size and how it fits in the hand, this light is short overall and the step down from the larger head diameter to the slimmer body makes it somewhat awkward to hold. It takes some getting used to, although I think the tail-standing ring will make it better (if I can only figure out how to get the original ring off). I can see why some may prefer the slightly longer AA body, and with 14500's or the new CR14505 3V lithium primaries, this might be the way to go. But this is more a personal preference; the well-regarded Surefire E1B is similarly shaped though slightly larger.
I think this light with a 18650 body would be great. It won't work with the existing head, but wouldn't that be a great option?
In short, I like it. It's a little bigger than other single CR123A lights I have, but I still carry it. Not every day, but it's part of my rotation.