Wow. I had high expectations going into part 9, but Araki blew those expectations out of the water. The JoJolands is so tightly crafted and exciting that it's hard to really express. Part of what makes this section so good is the main cast. The main Joestar this time around is Jodio, the cousin of part 8's Josuke and the great-great-grandson of part 7's Johnny. Jodio immediately stands out as he is a criminal, but he isn't totally ruthless and you want him to succeed. The same goes for his gang, who are all unique and fun to watch, and all get a great deal ofdevelopment in just the first arc.
That's another thing that part 9 excels at: pacing. So much is packed into each chapter, always keeping you on your toes. The Stand abilities help with this, as they're even crazier than before. This part is a crime drama, so seeing all these different characters try to get the upper hand is really entertaining and reminds me of the final arcs of part 7.
If Araki keeps up this momentum, The JoJolands will almost certainly be the best part of JoJo ever.