If you're into seinen, this is a must see. Excellent character development for each protagonist, and every plot line and side-story is neatly resolved. Pacing is also very good - the first half of the season has a lot of suspense, whilst the second half relaxes a little and becomes more dramatic. The characters win some and lose some, which keeps the tension at an appropriate level and the story from becoming predictable.
Anime this well-written come along rarely, so definitely give it a try!