The final book is interesting.
It is a couple hundred pages of wrap and lead-up then 600 pages of pretty much the most epic battle I've ever read about.
It ties up SO many threads from the other books: I think Sanderson went through and created a bullet list of every character that needed some closure and then went through and gave them all a small cameo - and even went so far as to remind the reader where that person fit in the story in a very subtle - not-in-your-face way.
There are some twists you won't see coming. I know I was thinking "no way" a number of times in the book, then later I figured out why something happened.
Some complaints include:
You literally will have to draw a map to choreograph the army movements. It's that complex.
The 'side story' of Rand and what he does is actually a side-story when compared with the main battle. There's just no way to make his part seem as important when all combined it's probably 30 pages sprinkled through the book. I also didn't care for his battle. It felt very much like a "yes I am" "no you're not" argument. (That's not a spoiler, don't worry).
The explanations of the pattern, etc was a nice touch. I could picture that very well in my head.
I was a little disappointed with what happened to many of the main characters. It left me with a bitter taste in my mouth, or just plain unhappy to have come all this way (22+ years with these characters) and have this result. Most of the time they were much too abbreviated. Only a couple of the character wrap-ups were truly epic.
Then again, I didn't particularly like the end of the Lord of the Rings, or Aragorn (Aragorn was far worse, but LoTR was annoying). Not that they are anything like eachother, so no spoilers, they just left me with the same feeling. Perhaps, to me, having a proper ending is impossible. The only ending to a book or a movie that really ever made me go 'hell yeah' was the ending to the Matrix. Especially when Neo flexed in the hallway.
The OP should really put "spoilers" in the title, because this thread is going to go there whether he wants it to or not.