Isabelle is wonderful as usual; I will watch any movie she's in no matter how bad it may be, because she always manages to elevate her character above the material and does so in this case as well.
The film is more reminiscent to me of Personal Best (1982) than Black Swan (always amazing how one person will mention a film everyone has seen and then they all have to mention it as well, no matter how wrong it is).
What did not work for me was not that the usual tropes were unusually absent but that the total affect of the film was a bit flat. Not the actors' faults, every performance was effective, but I feel the director let them all down because any tension, conflict or even continuity wasn't followed through to any natural conclusions.
An interesting film, but ultimately not satisfying despite the performances.