It was pretty bad.
I saw it yesterday and for the most part it was pretty bad. The only thing that made it somewhat watchable were the talents of James Gandolfini and Catherine O' Hara. Affleck on the other hand was flat out terrible.
I think the reason DreamWorks put this Christmas movie out so early was that they knew it would be destroyed by the competition had it come out during the holiday season. But it looks like even now it's headed for a quick box office death.