The redesigned Cybermen. They're much more practical as costumes, but so soon after their chilling (no pun intended) first appearance I think this new do is really disappointing. Also, I never get used to these guys' robot voices. Found them incomprehensible far too much of the time.
Otherwise I think this is a splendid little story. It doesn't stand out as much as some of the later, better, "base under siege" stories, and I do remember having a minor issue with the solution involving the Graviton. But I don't remember what it was, so it can't have been that significant.
