THIS IS A SPOILER FREE REVIEW!

Stone ocean is in my opinion by far the worst JJBA part. This is because I expected a well made story, but instead I got non-stop action. I literally mean non-stop action. During the entire part(except for some chapter focusing on DIO) characters do nothing but fight. I also consider fights in this part to be the worst fights in all of JoJo. They were boring and almost never advanced the story. Main cast was good with fun characters. I liked the protagonist Jolyne Cujoh the most, but other characters were also interesting. Unfortunately, they don't get much spotlight. Antagonist was also not very interesting, as he doesn't have his own goal and relies on luck way too much. Good thing about this part is that it felt most ,,JoJo'' of all JoJo parts because it is very bizarre. If you want to read this manga I recommend reading it in colours because without them it is very confusing.

SUMMARY:
+bizarreness
+Jolyne is a great protagonist

-too much fights which don't advance the story
-too much spotlight is put on Jolyne

There are more reasons on why this is my least favourite JoJo part, but I cannot say them because of spoilers.
My score:53%