Just watched a screener of it today. Holy cow...
Easily the best performance she's given us so far. The supporting cast is amazing as well (especially Allison Janney and Sebastian Stan).
If any of you have a chance to catch it, I highly recommend it. Didn't know what I was getting into and it (mainly the actors) blew me away.
I will be very surprised if she doesn't get an Oscar nod let alone win.
Edit: As many have said, the only real problem I had with the film was Robbie's face CGI-ed onto the stunt skater body during all the skating sequences. The CGI is very poorly done imo and can definitely take you out of the film.