I've had two, old version fixed eye on a wire core, and new version swivel on a rope.. I had the first action jam locking the second from opening (thank gawd) in a tree.. The second got jammed as the first in a gear bag.
If I were to buy a snap like that again it would be the trick lock carabiner gate style.
I'm still trying to figure out how the gate can get jammed open. I've had it jam locking it shut, and I've had it jam disabling the locking features..
If you need a snap, get the double locking steel. If not just go with a tri action biner