A Feast for Crows isn't the worst book in this series, but it certainly isn't a great book. This series gives readers interesting characters and a captivating world, but despite these things, it's hardly worth reading. The books are bogged down by too many details and would be much better with a few hundred pages edited out. I love reading and I also love the fantasy genre, but these books are just torture to get through. I only keep reading them because I hate leaving things unfinished. Think twice before reading A Song of Ice and Fire.
Definitely read this series. Don't be intimidated by the length of the books. You will get sucked in and finish them faster that you think. Read them before you watch the TV show. This is one of the best fantasy stories I've read.