When I first watched the Blue Exorcist anime I felt very dissatisfied from about episode 15 onward and I didn't like the ending very much. So when I found that it was based on the manga and that the manga was incomplete, I was excited. I read from the beginning and discovered that the anime separates from the manga around where I started to lose interest. I continued reading and I simply loved the manga! I personally prefer the manga to the anime and I enjoyed it much better. Also the fact that it is still ongoing is awesome, since I usually watch or read anime and manga that are already complete, this was a nice change to have actual cliff-hangers that I have to wait another month to see the conclusion. It's a great read and I really suggest that if you liked the anime or were dissatisfied with the ending or later episodes that you read this.