This is my favorite season premiere so far.
It was hard to make an episode as good as A Canterlot Wedding, but they succeeded.
I really like The Crystal Empire, the inhabitants, and especially when the mane 6 try to talk to them.
Cadance and Shining Armor reappeared!
King Sombra is a great villain, unfortunately he doesn't make a lot of appearances...
And there's a scene I find hilarious, when Rarity (and the others) become crystal ponies, I love her reaction.
At 6:02