Saint Seiya had a brief run on Cartoon Network, but due to its violent content, it was moved to a very poor time and gradually lost any attention it received. If you followed it while they aired it or if you are just curious, I encourage you to give it a try.
The story follows the following paradigm: Athena, with the help of the zodiac saints, protects the Earth from the other gods whose wishes are only to do away with humanity. The use of Greek mythology is vastly employed throughout the story as other gods such as Poseidon and characters such as Medusa make appearances.
While that may sound quite simple (and it is very much straight forward), the characters undergo a thorough process of development. With each fight they seem to acquire more knowledge and powers that help them mature from teenagers to men. The themes of friendship, loyalty and endurance are some of the most explored throughout this anime. The bond that ties the saints with Athena is mere responsibility at first, but extends itself to friendship and love.
Regarding action, there is plenty of fighting from beginning to end. At first the matches are part of a game, but later on they develop into life and death situations. As the series progresses, the saints also acquire more power, which makes the fights all the more interesting. I do have to warn you, though, since there is quite an amount of death and blood throughout these fights.
When it comes to animation, it shows that the the series was made in the 1980's. For its time, and even compared to some more recent anime, the animation is quite decent. I have no complaints about it.
The OST fits the series very well. Most of the tracks help convey the series' feeling of the larger-than-life plot and battles in the entire story. I believe they did a phenomenal job here.
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One last comment I'd like to make: This is not another dragon ball z. While there are some similarities, there is more involvment of more characters than in dbz (it doesn't always come down to helping the main character do everything).
