Slam Dunk! Is a sports comedy anime telling a story of a school basketball team and a newcomer Sakuragi Hanamichi, who basicly joins the club just to get the attention of a girl after being dumped by girls way too many times in the past. And as you might guess, Sakuragi then truly gets interested in basketball after hard training and finding himself - what a surprise - a rival in both basketball and girl attention aspects. The story itself is pretty decent, maybe a bit too predictable though. The animation and sounds (music, voice actors etc.) in this anime is average, considering the fact that this anime has seen plenty of years already. The characters are pretty much ok too but I found them a bit dull and simple in the long run. There should have been more depth to characters fit in 101 episodes in my opinion.
Slam Dunk! Was a huge disappointment to me since I heard alot of people complimenting the manga. Now don't get me wrong, Slam Dunk! is funny, atleast for the first 30 episodes. After that is just keeps on going way too repetitive and slow and to be blunt I think this anime has like 60 episodes too many. Personally I almost had to force myself to watch the last 20-or-so episodes just out of the custom not wanting to leave anime half watched.
So if you are looking for a good sports comedy anime you should start with Hajime no Ippo or Prince of Tennis instead. That atleast is my opinion of the matter. If you are looking for an anime that you can watch you left eye closed and maybe even skip a few episodes here and there and still know where the plot's going then go with Slam Dunk!
-C