the Mr. and I both liked it.
It was a bit formulic, in the 'this is a kid's movie' sort of way. And the girl-child was moderately insufferable (trying to hard w/ the pretend huge vocabulary thing)--she was always just a touch to 2-D of a character and they kinda failed at trying to flesh her out.
But all around, it was fun in a steam-punkish, family friendly sort of way.