I liked it better on second (fully conscious) viewing going from my initial wretched to watchable. Seemed very by-the-numbers, though. Too bad they couldn't have done more with the abandoned theme park setting (budget??). There were some nice ideas here which made the viewing better, the execution of said being a bit haphazard though.
I think speeding up the Cybermen is a bit like fast zombies and being slower and more methodical (though not necesarily more stompy) is more creepy. And the gold, while it has a history, is sillier than ever.
I surprisingly found the most natural performance to be from Warwick Davis which I did not expect. It's kind of annoying how Teflon everyone is to what's going on around them. I didn't have a problem with the kids' acting so much as having them go "Thank you, it was very interesting" after being nearly killed. "See you next Wednesday!" On the other hand, I had a hard time buying the setup last episode for them being there.