I'll try to spoil as little as possible.

Bizzare as the name suggests with its balanced plot.

STORY

Divided in two parts
First: about a boy named Jonathan Joestar who has a foster brother Dio Brando who was adopted by his father George Joestar to repay the debt to a man who "rescued" him from accident. As the story goes on Dio tries to take away everything from Jonathan because he thinks he can.

Second: follows Jonathan Joestar's grandson Joseph Joestar who is caught up in the aftermath of events triggered by his grandpa.

Story is not particularly bad but has some flaws in details, especially being extremely shallow and overexclamation of characters to each other's doings.
Things happen very fast and simply but shown as extreme as possible maybe to cover up for the plot-holes in the first part. And in the second part makes the exact mistakes but upgrades the MC's flow which makes it more watchable than the first part.

6 out of 10

CHARACTERS

Jonathan Joestar - a MC. ? (poorly written and still controls the story without getting better)
Dio Brando - failure of a villain. Bullys Jonathan because he can and tries to take over the world because he thinks he can. No exact motives and full of stupid "bugs".
Speedwagon - he didn't even has to be here but he's here. Gets excited over almost every step the MCs take and sreams them out for you.
Zeppeli Will A. - is better written than the MC and had to stronger but no. And is not rational enough to survive than dying for the MC.

Joseph Joestar - has no deep backstory but has a flow that can make you swim in.
Zeppeli Caesar - sidekick or guy to take place of his grandpa just like Joseph but is an upgrade of his grandpa as a character.
Speedwagon - comes back as an important person for the MC but still the as he was before.
Antagonists are better than the first part, having a decent motives and a believeable personalities.

6.5 out of 10

SETTING

Nothing is wrong with the setting. If there's something the series succeed in it is the setting and animation.

9 out of 10

ANIMATION

A unique animation style which is quite impressive. Colorful and fun. But still has very odd character design as the characters are very enormous and poses are weird.

8 out of 10

SATISFACTION

Even though I didn't like the first part I saw a big jump up in the second part which made me watch it more than I wanted when watching the first. Second part has better plot than the first and also depicted well. Maybe Akari-san finally got it seriously. ? Overall, the series might have been a hit in its own time but has a lot better rivals now, however it works as a gateway to the franchise and does it well. For ones who is starting to watch now as a "modern" weeb, endure it Joseph has your back.?

7.5 out of 10 (for second part )

Overall 6.5