I'm almost in the half of the book, so i can't make a final judgement yet.
I like the book well enough but honestly for a book so long in the making it should have been edited better. Somes lines, sentences, thoughts are repeated too often. There are too many seemingly pointless descriptions, and many things could have been written in less pages. Also GRRM makes a bunch of characters make not-so-smart decisions which given their normal dispositions seems rather strange. Like he made too much of certain characters and need to bumb them down now. (Does this sentence count as a spiler? if so i apologize).
So far, and this can change with the second part of the book it's the least of the series in my opinion. Then again i liked A feast for crows ( even though not much happened i found that book well written). So what do i now.
One thing the book does do is give you a improved view on the world. It's my belief that GRRM world is now fully fleshed out, almost completely revealed. We get to full envision the free cities, we get a better view of what the north in truth is like (beyond the honourable starks). The magic side of it all is getting a proper shape. That and more is very interesting. (again if this counts as a spoiler i'm sorry)
However this book, like AFFC so far has been more like setting up the stage for the end of the story. The story does progress yet at the same time in some ways it progresses too slow for the liking. like GRRM is fine-tuning the stage for the endgame. All in all i don't know yet. The verdict still out. The second part of the book will be the decisive factor. I'm hoping GRRM will deliver, like Erikson usually did with his book of the fallen. i must confess though that in many ways i liked the mistborn book that i've just read more, even if Brian Anderson tale is one full of clichés.