Gave it an Excellent myself. Primarily for the stuff from Smith and Davies, loved the Doctor-v-Doctor stuff and the hidden emperor. I caught the bits of 10 really easily, but missed any references to 9 or others, where were they?
Clara's stuff was fun and entertaining - her scenes with Smith particularly, I do love the ship teasing - but she did seem to slip into commading way easily. The kids were... well, I'm glad they were in a coma for most of it. The girl especially.
Overall another really good episode from Gaiman, albeit not on the lever of The Doctor's Wife but that's quite alright. Looking forward to more Victorians next week!