I just watched it and I'm left with two simultaneous but conflicting feelings:
1) Extremely entertaining, dramatic and visually impressive. So many beautiful scenes (the dragons above the clouds! Drogon protecting the grieving Dany, etc).
But...
2) Highly disappointing, anti-climactic, and when examined beyond the surface level of 1, it had so many problems and was rather poorly put together, especially as a "penultimate climax" to an eight seasons series.
I'm left feeling that there was this 8 year build up that led to very little pay-off, except for sheer spectacle and drama. It was like getting to know someone who you realized that, in the end, wasn't nearly as deep or complex as you originally thought. I'm particularly disappointed to the degree that there was no real exposition or revelation about the Night King and White Walkers, or Bran for that matter.
On the other hand, I guess it is the process that counts. The series was a great ride, and perhaps that was the problem: it would be difficult to create a climax that could do it justice, and at least so far (still only halfway through the last season), it didn't come close.