Let's begin.
[Story:9/10]
As much as the story is realistic, with amazing detail and art, sometimes going frame by frame of how the basketball players play, as well as the story focusing on Sakuragi Hanamichi and the Sohoku team of how they progress, there is still some "too remarkable moments", especially early on.
This is pretty amazing already, given how most sports mangas like to perform "Giant Killing" using underdogs using a lot of willpower and/or strategy to blow away the rest of the teams/competitors. It's quite amazing how the story flows smoothly as well, given that there are multiple complications, climaxes and comedy. There is hardly one part of the manga that seems out of place, and from start to end as reality is, there are good times and bad times.
[Art: 10/10]
I would give 12 if I could, the art is just amazing, especially at various points of the last chapters, where there were a lot of different tones and styles used to highlight certain areas, and detailed skillful drawing of various basketball moves, facial expressions, background and so on.
[Character: 10/10]
This is another selection I would like to point out, the character characteristics and backstories of some characters are incredibly explored. However, for the few main characters (5 + 1 actually), a few of them were only touched on surface and there is still little understanding of how the "incredible rookie" could possibly be so incredible, aside from talent, a term which I believe every sports manga tries to exploit.
Still, the amazing portion of the characters might be character development, as we watch how the various characters grow through their toughest periods inside games, as well as what we can learn from their "experiences".
[Enjoyment:10/10]
I would give a 11 if I could. The emotional rollercoaster and growing potential of both the home team and competitor team alike gives great pleasure to the reader, very much like how I enjoyed reading "Zatch Bell". It is where you will not be able to predict much of what will happen next and the suspense hangs thick in the end due to improvements during battles/matches on both sides.
[Overall:10/10]
All in all, this manga is amazing, furthermore I had read that Slam Dunk was a manga that popularised basketball in Japan. This is amazing, since this meant that when it was starting, basketball is actually not a hot topic, but the manga managed to catch on to several volumes and even influenced culture.
^^
