Katherine L.wrote a review of CAMP USA Nano 23 Carabiner on March 11, 2012
As a female climber with small hands, this is my absolute favorite biner - and not just for racking. I use them on my draws (regular and extendable), and for me, they are perfectly sized for clipping the rope through. Compared to other micro biners (like those by Metolius) the gate opening is a (very important) bit larger, while they are both lighter and cheaper.
Another reviewer mentioned the gate action was funky - I've never noticed that. Never even really thought about it, which I guess is what you want!