Probably not alot I can say without repeating what others have already said on this thread, but...
I thought it was a good, fun episode. Definitely seemed aimed more towards younger viewers, with Harry Potter references and witches straight out of countless children's stories (craggy faces, long noses, cackling laughter etc.) but plenty for adults to enjoy as well - many references to lines from Shakespeare's plays (particularly liked the Sycorax one) and it's clear the writer did his homework on the chronology of the plays (pointing out that Macbeth and Hamlet had not yet been written was fairly spot on AFAIK.)
I'm not too keen on historical DW episodes because I'm always distracted by historical accuracy (or lack of) although I thought Elizabethan London was done quite well (certainly more believable than the 12th century Sherwood Forest of Robin Hood...) - enough that I was wiling to overlook the fact that no-one (apart from Shakespeare) seemed to take much notice of a woman walking around in a red leather jacket and jeans.
And it was a delght to see the wonderful Christina Cole, who just melted my heart in the rather dismal Hex.
And Freedonia made me laugh. The Doctor is a Marx Bros fan?