MakeAmericaGreekAgain

I was accepted to the Classics MSt course at Oxford and the Classics MPhil course at Cambridge. I'm seriously considering those offers. Has anyone here done those programs? If so, what was your experience? How rigorous was your course? Were you satisfied or disappointed with it? Also, as a graduate of an American undergraduate institution, I am wondering how the transition to a British graduate school went for you. I'd appreciate any insight you might have!