I just finished the third book. The fifth one drops tomorrow. It supposed to pretty much end the first saga. The last 2 books take place 5 years after that. I gotta say, the first book was interesting, the second book was interesting, but the third book just took everything to a whole nother level and blew my mind.
I just posted in the Dark Tower thread too, but I gotta say Song of Ice and Fire and the Dark Tower are two of the best book series I've ever read in my entire life.