Super light (and small), but weird gate action.
As other reviewers have said, these carabiners are quite a marvel, lightweight, plenty strong, and a good price. The gate opening is somewhere in between the Metolius FS mini and the Moses or Oz. I use them for racking cams, which works quite nicely.
I don't take issue with their small size, my main problem with these is that the gate action is funky. The spring starts out with "average" resistance, then hits a "dead spot", after which the resistance increases until the gate is fully open. This doesn't decrease functionality per se, it just doesn't feel nearly as smooth as other options in the weight class.
Overall, a lot of function for your dollar.