Lots of great stuff as this arc reaches a climax: Sebastian demon-ing out, Ciel snapping out of it (and I officially believe there aren't twins, just two aspect of Ciel, one of which he sacrificed), Finny being surprised at Sebastian's strength--that's gotta come back in the future--(and Sebastian IS stronger than Finny; I'm not sure we knew that before), Sieglinde learning the truth and being revealed as an innocent victim, and Ciel offering her a choice he made for himself (with Sebastian's help).
So, basically, awesome. I continue to love the way the manga combines the Victorian setting with anachronisms. I also noted how Sebastian was impressed with the technology they discover.
Ready to watch the servants kick some ass, especially now that Snake is part of the unit!