The WC Xenon Lite biner is a small/medium size bent wire carabiner. It's a hair smaller than the neutrino, but bigger than the Camp Nano or the Metolius Mini.
I purchased 18 of these biners about 6 months ago. I was attracted to their light weight, the fact that they have some nose protection, and the bent wire makes them very easy to clip.
I chose them over the trango superfly and the mammut moses because of the nose protection. This is a personal thing for me, I don't like how the tip of the wiregate sticks out well over both sides of the nose of those two biners. Might not be an issue, but I could see that wire getting hung up or dragged along the rock, leaving you with open gate strength.
Anyway, after 6 months of moderate to heavy use, out of my initial 18, 2 of them have super sticky gates. With barrel gates, you can usually clean them up and unstick them, but this isn't always the case with wiregates, I suspect that the wire may have gotten a subtle bend in them, funking their action. I suspect this happened in my pack. It's too bad, these were my favorite biners because of their light weight and good action, but I can't recommend them because of this issue, and won't be buying any more of them.
EDIT: I just added the link to the page on Wild Country's website, which says the biner has been discontinued.
Not sure I like the Xenon... they're super cheap right now but the gate action seems to "give" and not much resistance ... easier clipping but i worry a rock feature may open it. Anyone have experience w/ these?