I just finished the book. The writing is superb as usual, but I'm more then a little disappointed with the story. Allow me to quote from a review:
"Instead Martin breaks off the book on a series of titanic cliffhangers that dwarf anything seen previously, and only a few story threads find any sense of resolution."
(Massive spoiler ahead, don't read if you haven't finished the book)
The last chapter of Jon left me literally cursing and shuffling through the pages to find another chapter of him or of someone close-by. I hope he didn't really die but found a way to go into Ghost like Sixskins. If he really dies, then the series are finished for me as in my opinion he was the most interesting and fun character to read (Daenerys was a close second).
And as for Daenerys, I so anticipated on a dragon-invasion, yet at the end her Dornish prince is dead, possible her lover and bloodguard too, her dragons are not under her control and she's all but captured by Khal Jhaqo and thus even further away from Westeros.
According to the letter from Ramsay Bolten, Stannis is dead as well. As Jon says, there's too much truth in that letter to toss it away without further thought.
And to finish it all, one of the only 'good' Lannisters, Ser Kevan, gets murdered in the epilogue, resulting in even more chaos. Why him and not Bolten?
The only people I found some satisfaction with are Arya and the Ironborn. Here's hoping Theon is still alive...
This book gave me a bad aftertaste and knowing that I have to wait 5 years to know what happened does not help at all.