This series started out good. The first Arc var really good, and it wasn't that bad in the arcs after that either. But the further out they came, the more fillers they had, and the more dragged out dialogs and fight scenes. I stopped watching when they suddenly jumped out in the middle of an arc, like nothing had happened two times, in the same arc. Both times were for over 8 episodes. The series had a lot of potential, but quickly started to die out. Naruto is pretty much the same, but they managed to get up in Shippuuden, and their fillers are mostly a lot better.
If you are looking for a well made, long running series, you should rather look at Naruto, or One Piece.
overall score: 4/10