Overall a bit of a filler episode that is still setting up future events quite nicely.
A few thoughts and questions:

Siblings Jaime and Cersei doing it in the septa next to their dead kid. That's pretty messed up. I am not sure that actually happened in the book and it didn't really fit with TV-Jaime's established character.

The Viper is excellent. His exchange with Tywin was great. Tywin's scenes always work, somehow. It's just a pleasure to see someone being ruthless while also being competent and intelligent.

Was Dontos killed in the book? I can't remember, but I don't think so. I don't think they should have done that, making Littlefinger the bad guy. He's not that black and white for me.

Awesome final scene with Dany and her champion (much better than the first actor), the catapults and shackles. Too bad as a reader you already know she'll soon basically do nothing for an entire book and then loses everything.

Opposed to the sentiments some people had in our discussion last week as to the details of the wedding, added scenes and skipped ones, I feel you can already tell there'll be a time when the show will be much better than the books. Not as detailed and rich, no. But so much more to the point and losing a lot of dead weight we had to read through in FFC and DWD. So many characters are already approaching those points and they will have to come up with things to do while moving on. I am very excited to see the first parts of DWD on the TV screen.