I've seen it mentioned by a few people, including Redux creator Dan Abramov (who is very open about tweeting links to 'competing' libraries!), but I've only taken a brief look so far.
My initial impression is that it seems really interesting, although I wonder if the use of generators will scare people away. Many devs are already exhausted with the number of new JavaScript features they're being told to learn.
I definitely want to dig a bit deeper and try it out properly though.
Best comparison I've seen so far is that it's sort of like "background processing threads for Redux". The downside is that it might not mix well with time-travel debugging, because a saga effectively has its own internal state.
That said, Dan Abramov does seem to think it's a very intriguing approach, so it's worth keeping an eye on.
