I loved the new design for the Cybermen. The story was so-so, and had rather obvious flaws. The chief of these is that the Mondas-originated Cybermen at some point merged with the Cybus Cybermen, according to episode writer Neil Gaiman (who wrote the Series 6 episode "The Doctor's Wife"), but we never actually got to see this, nor was any mention of it made in the episode itself. So we end up with the Doctor managing to delay the Cyber-Planner's invasion of his mind with a gold ticket, a weakness the Cybus Cybermen never had, and no explanation as to why they have it.
The episode was saved somewhat by the incredible acting talents of Matt Smith and guest star Warwick Davis (of Star Wars, Willow, and Leprachaun fame), but neither of these two fine actors was given much to work with. Smith, by the way, has confirmed that he will be returning for Series 8.
I don't know why Moffat is letting such poor writing permeate the second half of Series 7, but the next episode, "The Name of the Doctor", is supposed to be freakin' epic and from all we've been given so far, it's going to be yet another monumental letdown. I don't know if Moffat is trying to get himself fired from the show, but if he is, a simple resignation would have sufficed.