The show is, as expected, utterly beautiful to look at, the actors, the scenery, the clothing and the castle, all absolutely stunning. But add to that the compelling storyline of assassination plots, political alliances, royal weddings, witchcraft, prophecy, forbidden romance and more! That's what makes this show great. The substance of the show is strong, being based on historical events, and all the beauty is just the delightful cherry on top.
I will admit, like some other reviewers, I wish the accents were a little more accurate. It doesn't bother me that they are speaking English as I don't want to be distracted by subtitles, but couldn't they at least fo French and Scot accents? That seems like the smallest touch that would add a depth of realism and remind you that these people are all from foreign lands, conspiring to make their own realms stronger and more powerful.
Can't wait to watch more, but trying to ration it out.