I've had one since mid- January and it's a pretty nifty light. I run an EagleTac 3100 18650 in mine now and even brought it and the Xtar WP2 II with me to Los Angeles, to visit family over Easter. 10 neices and nephews playing with it and having fun.
I'm not too technical in giving facts and figures, but it's a bit slimmer than my ZL SC-600, but a good half inch longer and while not as bright, it's more than capable of putting out some serious light. I was hitting the tops of 80 year old 150' tall Eucalyptus trees in my parents' yard. Tint is on the cooler 'blue' side and not the 'green' side, but it's not super cool. Seems to be a 'thrower' more than a 'flooder'.
It's slim and short enough that it clips to the inside of one's pocket and isn't a bother. It's not nearly as small as the Zeno E03 that I just got, but it's not obtrusive in the least bit.
The square, flat, rubber mode button is sometimes a bit tough to locate in the dark, but you get used to it. My 4 year old nephew was able to get the hang of it faster than I was able to, lol. It's not like the ZL switch, which is easier to locate.
I like the fact that I can fiddlie with 18650s, or just use primaries from the drug store, if I need to go that route. The ZL can only run on 18650s and once they're drained, you can't walk into CVS and plop down the debit card for some 123s.
The holster isn't the thickest nylon, but it works fine. I'm not a 'pocket clip' junkie, so those guys will complain that it's not bolted to the frame, or arc welded there, but it's fine for my 'less extreme' needs. I think it also comes with spare O-rings, but no lanyard.
I got mine for $60 delivered, so while not chump change, it's been a welcome addition to my modest collection.
Chris