This had me laughing madly for the entire episode, there are many non-sensical twists which actually made sense and non-sensical dialogues which actually made sense too, such as the "adults always betray" speech.
All the characters you like appear and have a role on the special, it uses all the themes and jokes on the series in a fresh way and both, becky and rei were looking stunningly sexy.
The art is what you would expect from a low-budget shaft. It changes quality at random and mixes real life pictures, stills and text frames (not so many as in bakemonogatari, just when mentioning scores) and the most budget is spent in menial things like eyes and oppais... not that i am complainning