Phew! I opened up Martin's A Feast for Crows over the weekend, and finished it just now. His novels become even bigger page-turners as I get further into them.
No time now for a full review, but here's a quickie: exciting book, good plot development, and even better character development. (Though in some cases "character deterioration" may be a more apt phrase.) It doesn't have the unbelievably awesome breathless conclusion of A Storm of Swords, but it's hard to think of other books that do. I do think that the book should really have been about 50 pages longer. Cliffhangers are great, but it helps to at least know what the heck is happening.