It's still pretty useless imo. Even tho its been "out" for months now. I don't even check it once / week anymore lol.
I think they fill up your invites all the time, so just keep inviting. I have a shitload left. Just tell me. Tho they shouldn't be hard get by anyway anymore.
The third party translation bot (aunt-rosie (since rosy or whatever the name of google's own bot isn't out yet)) is kinda cool, but buggy as hell. Seriously, watch out for majorly heavy waves, lol.