HORRIBLE CHARACTERS!!!
It has all the potential to be an amazing movie, but it falls short at every turn.
Every family member was disgusting and horrible. They seriously bullied SJP's character, but even with that, her character isn't likeable enough to root for// doesn't have any development. The family members never have any redeemable moments. Each scene boils down to simple miscommunications.
The actors themselves did a decent job with the script they were given (mostly Rachel McAdam's character, Amy).
ALL IN ALL-- don't watch it. It was one of those sibling swap troupes, but it was very poorly done. Don't waste your time.