Loved it, Davros was the highlight here for sure. Stellar work by both Moffat and Bleach. I almost bought that he had 'turned for semi-good' after a while. It isn't often that Doctor Who can fool me with a character's motivation like that, especially when it's such a big, classic villain. Loved all the scenes with Davros. The ending is a bit eh, and some more time could have probably been spend on what Davros' success actually meant instead of just letting the sewers crumble, but everything leading up to it was gold for me.
I assume Missy's ending meant that she might work together with the Daleks at some point in the future (possible allowing them to use her Tardis in exchange for her life), or they'll just use it as an unexplained reason why she's alive the next time we'll see her. I suspect Moffat doesn't quite know yet.
Anyway, great start to the series, very hopeful for the rest. I hope they can keep it up.
'The only chair on Skaro' makes this a classic.