Good casting including non-annoying kids, at least two dumb solutions to problems being shot down as such, and a much-needed villain upgrade for the Number Two Doctor Who Major Baddies. I think Matt Smith dropped the ball a bit in his Gollum-and-Smeagol number, but that was good enough too.
OK, perhaps they could have done a little more to blunt the distracting similarities between the New And Improved Cybermen and a certain other iconic sci-fi cybernetic-baddie-race, beyond "but our ones have blue lights on their heads!"
But I think that's entirely compensated-for by Cybermen that are, one, not avoidable by anybody capable of jogging, and, two, now able to "upgrade" any other sentient life.
Or just somehow upgrade an actual Dalek. The result would surely be-
OK, the first attempt might not be terribly impressive. But I'm sure they'd get it right after a few iterations.