So I've posted my review of Winter's Heart by Robert Jordan on Goodreads if you feel the great urge to read it.
This book, despite having probably the best ending of any of the currently available Wheel of Time books, is just plain awful. It's boring and focuses far too much on characters that aren't doing anything important, rather than focusing on the characters that actually are doing things. It's #3 in my worst books of the series trifecta. #1 and #2 being Crossroads of Twilight and A Crown of Swords respectively. Had these three books been spread out more throughout the series, it would not have been so bad, but there was about an 8 year long stretch where the worst books of the series just came out one after another after another. I'm actually surprised I stuck with the series at all, looking back on it.
An awesome ending can make a good book better and a mediocre book good, but when there's 600 pages of absolutely nothing happening, even the most awesome ending in all of fiction can't make up for it.