Thought it was terrific and felt so fresh and different compared to other finales we've had under Moffat. Think the Nethersphere concept is really creepy and was a great way to bring back The Master and the Cybermen in the same episode.

Obviously the main talking point us the big reveal, got no problem with Missy being The Master at all and think Michelle Gomez is very good, though the kissing and flirting between her and The Doctor just had to happen, didn't it? Haha.