Went today with wife and three kids. I was expecting to hate it, and I loved it! Very visually inventive, nice story, excellent cast. And it's set in London. A sort of hyper-realistic steampunk London, but still.
The story? It's basically 
The Blind Side meets 
The Golden Compass, with a sprinkling of 
Nanny McPhee.
The female cast are uniformly wonderful. There's 
Julie Walters as the elderly aunt, and 
Madeleine Harris as the teenage daughter.
But the standouts are 
Nicole Kidman as the villain, and 
Sally Hawkins as the mom. I love them both, for different reasons.