I thought it was pretty good for a first episode, they usually are slogs but this one had a bit more verve than previous ones.
I really really liked the Winterfell scenes. The conflict between Jon and Sansa was really well done and I particularly liked the Karkstar and Umber kids bending the knee, it was reminiscent of a certain scene in the books that we didn't really got on the show. The Hound and the Brotherhood scenes were very good too, it showed a humanity in the Hound that we didn't really have seen and closed the circle of his redemption nicely.
The Euron parley was good but it bugged me when Cersei made fun of Euron's lack of humility, since when does Cersei care about someone being too arrogant? It was a really out of character and lazy thing to say but it was a small thing after all.
I had some real troubles with the Bran scene though. It was really dumb for Dolorous Edd to act all suspicious of a little girl and a cripple boy being wildlings when they let every wildling with a pulse go through those gates, besides them helping Jon win a massive battle. That wasn't the worst part though, when Edd asks them how can he trust that they are Bran Stark and Meera Reed, Bran tells him he knows Edd was on the Fist of the First Men and Hardome and he knows that he saw the Night King, who is coming after all of them. Excepting that Bran greenseeing powers have become main knowledge on the realm I don't see how that answer convinces an already suspicious Edd that they are who they say they are, but somehow it did. Unfortunately this is the kind of clunky and inconsistent writing that gives people like Jooney and the rest of the serial complainers ammo for weeks.
The rest of the episode was alright. Arya killing the Freys was well done but somehow unsatisfying. I have never given two shits about Sam storyline and his scenes here didn't change that but it was nice seeing some innovative editing on that first sequence. Dany's march through Dragonstone could have been pretty epic if that wasn't an unoccupied shitty castle on an island that nobody gives two fucks about. I know it's her first steps on Westeros since she was a child and it was her birthplace but it still is just Dragonstone, the place Stannis felt was an insult when it was given to him.