I don't want to derail the thread for book talk. But to be brief, and totally non-spoiler: I didn't (and don't) care for the direction much of the story went, and it got too bogged down in minutia (large sections pass where I had no idea who most non-main characters were). And the narrative was so dispersed that often I could go a couple hundred pages and not feel like the story advanced much at all. Very similar to a comment a little ways up about how the show is covering so many narrative threads that some are complaining "nothing" his happening. It is, just it's so dispersed, there was no narrative momentum until 600+ pages in.
I'm about 1,000 pages in (my edition has 1,100) and it's gotten better. Jaime's arc is the best in the book, some really great longform character work. But I still don't like the bulk of where the story has gone.