Story: The story is pretty straight forward. A young man wanting to be the best at something. Nothing particularly unique. But it's still very fun to watch. Especially if you like sports anime. There really aren't that many good sport shows with boxing. I'd say something which I really noticed and which really made me like the show was the pacing. Unlike most other shounen sport or fight shows this anime is only 12 episodes long(not counting the sequel, which is also 12)and because if this does not waste time but keeps things moving. I know that I often find myself bored out of my mind watching a fighter trainfor 20 episodes on end, but this show just keeps on going without wasting the viewers precious time on boring re-hashed training methods. So if you want a good fight show that won't take a life time to wade through this show is what you're looking for.
An 8 on story.

Art:
Despite the show being made in 2004 the character designs look like something much older. Which for me, as a fan of the old things, is very nice. It's like seeing your favorite old series, but the animation is good! I loved the art, it's fun and looks old but is smooth. A huge treat for any oldies fan.
A 10 on art from me.

Sound/music:
The sound effects are quite good. Which is very helpful to the show as it's a boxing show. You want those punches to make a good sound.
The music is not generally spectacular, but it has moments where it really works incredibly well and draws you into the mood of the scene.
I also like the intro very well.
A 7 on sound/music.

Character:
The show has an ensemble type cast like most sports animes.
The main character who is hard working, the mains's supporter, the smart, calm, rival/friend, the comic relief, the pretty boy, the slightly mysteries cool guy, and a few other characters which fade in and out and lots of 'villains'.
At first I wasn't really impressed with any of the characters, but after a little bit of time, and seeing the characters develop, I fell in love with them. And it's not often that I (at least) like all of the characters in a show.
Even though the show is so short they manage to put a lot of character development into it(and more in the second season)but as I said earlier, they don't waste time.
A 10 on character.

Enjoyment:
I loved this show to death. I rarely wish that a show had been longer but I did with this one. Though I think they did very well in stopping it and only making a short second season. If you go too long you ruin something.(It spoils >.<)
So it leaves you wanting more but in a good way.
It has very satisfying fights and lots of fun moments.
A 10 on enjoyment. ^^

Overall:
As I've said, this show would be liked I think by any sports anime fan.
I highly recommend it. A 10 overall.

I will mention that the ending is such that you have to watch the second series if you want closer, so please be aware of that.