So this may be considered filler and it is pretty short but I really enjoyed this season. I'm actually surprised that they put as many episodes as they did into this set, but its honestly a really enjoyable season.
Once again these episodes leave the main arc in Hueco Mundo but this is not the same as other filler. In this set we get to see the story of the Vizards and how they became what they are in the present. The set takes place about a hundred years in the past and really delves into Kisuke Urahara's back story. There are a lot of appearances by various Soul Reapers, including Hisagi, Byakuya, Gin, and Aizen. Its an interesting story of intrigue, betrayal, and how the Soul Society is run.
After episode 213 we get a couple episodes about Kon...great. They are just run of the mill comic relief fillers and they are entertaining to a degree. I don't really like Kon so the two episodes really weren't for me.
At 215 sort of return to the main arc. The Arrancar start their attack on the world of the living and are met by Soul Reapers. The lieutenants start fighting lower level Arrancars and Ichigo continues his fight in Hueco Mundo. They are really great episodes but this set doesn't get very far into them before it stops.
In short the filler in the middle is annoying and the last episodes are a build-up that will pay off in the next set. However, the reason I plan on buying this is the episodes at the beginning where we get to learn some of the back story on the Vizards and Soul Reapers. The price has been talked to death so again I will not speak on it. The episodes in this themselves are great and well worth the watch.