Just my two cents
I take my family to watch this movie last night, and honestly I'm quite uncomfortable with the behaviors of all the cast characters, which seems 'trying too hard' to be lovable and realistic. In fact, the characters seem far too scripted and not at all believable. Not to mention the hollow plot, slow story progression, and that my wife actually fell asleep midway through. At the end of the movie, we're both in agreement that this movie really sucks.
However, our kids actually loved it! They kept on discussing, smiling, copying the characters' moves, laughing when recalling their favorite scenes, and seem to be enjoying themselves all the way home. Now that... really made both of us cheerful. So well, I guess it's a very good kids movie then, and I'd give it an 8/10 for entertaining our kids.