I must say this is one of my favorite movies in terms of production design for CGI. In my opinion this is one of the most beautiful steam-punk universes ever created for film and a touchstone for anyone interested in special effects design. A shame the series was never continued.
High expectations were not met. Presumably this would be the first in a trilogy, although five years later and there's still no second film. There was too much information coming from all angles at all times with no time to let it sink in, yet it still felt thin and under-developed (especially considering the source material). Looks great, but that's the only high point.