It might be slow at the start, and slow once in a while in some episodes 'cause some things get repeated. But overall, the action, strategy, unique ideas make this a great show to watch, especially as a long running shounen anime. Fortunately, there aren't much filler episodes. Maybe 1 or 2, but they weren't boring.
Honestly, I am writing this review hoping that I'll get to watch season 2 of