I've got some issues with it I'll go into when it's not late, not as good as Spare Parts. It was hurt a bit by the promo work (much like Dark Water was.) and I'm not sure where the story is going to go. I assume The Master came through the black hole and didn't want to leave the ship without an army of some sort. So has nudged the Mondasian colony ship to repeat what happened on Monday.
Bloody ironic after all that and the huff about the "Mondasian Cyberman!" line that it wasn't even actually a Mondasian Cyberman.
I'm almost certain Murray Gold slipped in the classic Cyberchime at one point.