Just seen it - it's a Wes Anderson film that like "Where The Wild Things Are" really isn't a kid's film. Kids can watch it, but there are some bits that aren't for younger kids and a lot of it will go over their heads anyway.
Will you enjoy this film? Quick quiz: did you like "The Royal Tenenbaums"? If yes, then probably - the stop motion suits Anderson's quirkiness and the characters wander that line of almost-unlikeable-and-flawed genius. If no, then you will find this film a lot of talky wank.
I loved this movie, it's classic Wes Anderson. I was worried about the animation when I first saw the trailers, but it turned out really, really well. And ya, if you like Anderson's movies then you will like this movie.
I was glad it turned out better than Bill Murray's past incursions into voice acting.