Well that was awesome! It was definitely worth seeing on the big screen as the showing included an introduction by Steven Moffat and concluded with a making of.
It was very clever how they took the same show and moved it to a different time. I also found the Victorian versions of the characters hilarious including the appropriate sexism and xenophobia.
I would like to discuss the twists but will wait until more posters have seen the special. Until then will just leave a very minor spoiler.