Much better episode than any of this season I would say. Peter Dinklage continues to steal the fucking show with his dialogue. I hope they pay him a lot because he's been the saving grace of each and every season no matter how bad things get. Enjoying Arya's vision training even though it's not amazing or anything. Also great to see the chainless maester get some screen time and they definitely seem to be hinting something about the Mountain zombie by him saying "the 'work' continues". Ramsey and Theon are still bad characters that suck but Lord Bolton is always great. Jon uniting the wildings and crows was good. It's been teased for multiple seasons so it's cool to finally get some pay off to his character arc.
The end sequence was pretty cool though I had some issues with it. I hadn't realized that the reanimated skeletons were also white walkers. My question is how are they ripping through solid wooden walls without any muscle mass to speak of? I could buy it if the standard fleshy walkers did it but skeletons doing it seemed silly. Overall I have not been a huge fan of the ambiguity of the white walkers' strengths and weakness. Like they already get strength, endurance, and immortality plus some of them even get access to 4th level spells. I guess it's the baby sacrifices that are eligible to become white magi? I have no fucking clue. All I know is that fire kills them, dragon glass kills them, and now apparently Valerian steel kills them.