This movie was excellent. The family was well portrayed; from the beginning with the father not wanting to admit his daughter had a disability, to the mother dealing with the guilt of putting her daughter away by trying to make up for it almost a decade later.
Excellent cast (Lewis, Ribisi, Keaton, Skerritt, etc.) and I loved how the disabled characters were believable. Sometimes movies depicting the disabled are no more than an insult. Lewis and Ribisi were incredibly believable in their roles, actually I had never seen Ribisi in a role previous to this one and - I have to be honest - I really did not think he was 'acting'. I thought the casting director had found someone disabled to fill the role. Once I found out the truth, I thought Ribisi should have been nominated for an Oscar!
For the person who complained about the other story lines going on in the movie; a movie has to be multi-faceted, otherwise it can become boring. And I don't think the other story lines were too indulgent, they added flavor.
And a mother that has a child whom she believes she has failed in the past yes, she will be a basket case and indecisive with every step she takes. That's what mothers do...it's the norm.
Another great movie that was obviously overlooked by Hollywood. (So what else is new?)