Ok, I admit I was sceptical at first before watching Twelve Kingdoms. Fantasy is not my favourite genre, and the animation from what I had seen looked a little dated. But wow, I was completely blown away by this.
I agree with many of the other reviewers on the net that this anime deserves to get an 11. It is definitely one of the best series that I have ever seen, and I've seen a lot. It is an story of epic proportions that follows Youko Nakajima as she struggles through major events in a fantasy world.
If you are still unsure of whether to watch this anime or not, watch the first 8 episodes or so, or go read other reviews online, they'll be sure to say the same thing!