First off, I am not a Mayim Bialik fan, as a person. But that has nothing to do with her talent in the writing, directing, producing area of this film. I am glad I didn't know it was so much her when I started to watch it - otherwise I am afraid my prejudices against her would have kept me from viewing a really good movie.
This is about the complexity of a messed up family - and what family isn't totally messed up? And this family has made it an art form.
It has 2 great actors, Dustin Hoffman and the ever surprising Candice Bergen and a further ensemble of younger ones orbiting Hoffman and Bergen.
So, if you can handle some rough family dynamics (normal), give it a go.