It's a bizarre story, dealing with Japanese legends during feudal japan. It's got Samurai Champloo meets Lost TV show meets FLCL (the bizarre feel of it I mean) show vibes. From someone who normally can't stand shonen format, I would call it shonen light. The stuff that normally bogs down shonen storytelling is handled in a way that doesn't make you want to fast forward past the emo. The action is fun, extremely colorful (a theme this season), and the characters all have their own drives and their own agendas beneath the excuse that brought them to the island.
I ended up binging the whole season. When taken from start to finish it provides a fun and interesting storyline with good character growth. The story has good pacing and it provides a slightly uncomfortable mystery to keep you curious. I was a bit disappointed when some of the mystery ended up being not as complex as I was hoping for but honestly, I really enjoyed the show and am looking forward to the 2nd season.