I'll be honest I like this series fan service and all but this 4th season just grated too much. First off there was some character redesign that just seemed to make the animation look off, second was the stupid episode 0 which was a waste and down graded the climax from season 3 to trivial trash, third I got a feeling no one associated with it gave hoot about it and the feeling I got from them was Ok another season just done for the money. Overall I was less then happy with this season and far less likely to rewatch it.