I'm glad you enjoyed it, Wearever. It's certainly an entertaining way to look at history and it gave the impression that Philippa Gregory has done as good a job of getting it right as she can ... but it doesn't do to forget that a lot of it is still fiction. On the other hand, it's certainly no worse (and definitely more accessible to a modern audience) than reading Shakespeare for history lessons.
I certainly found it to be more instructive than
The Daughter of Time, but I guess we must still thank Josephine Tey for paving the way for books like this.