Ok, looks interesting.  I actually might see this in theaters(assuming it gets enough distribution that I don't have to hunt for a theater that's showing it).  
The pluses -
*Mortenson and Fassbender are awesome actors who can really deliver good performances.
*Kinky sex(hells yeah! 

)
*I usually dig period pieces.
*It's about Freud & Jung which isn't subject matter I have seen exploited yet, so 

*Cronenberg mad A History of Violence(which I loved), so there's that.
The minuses -
*Other than AHOV, I've never much cared for any of Cronenbergs other films(granted most I just skipped completely when I saw the trailers/learned the premise).
*Keira Knightly - I just don't get her appeal....AT ALL.  I disliked her previous movies that I saw(though I can't be certain I've seen them all).
The  pluses out-weigh the minuses here so  it's all about availability(or  if for some reason it gets scathing reviews...I'm talking GL level or worse).
Kinda hopeful on this one.