I gotta watch more episodes, but from what I've seen, I like it. It's a fun anime. Some people don't like shows like this as apparently everything ever has to be deeply philosophical or something, but it's a fun anime to watch. I quite like it. My original exposure to it was in the defunct manga magazine Raijin Comics, where they translated the prequel, Fist of the Blue Sky. Another fighting anime you might like is Baki the Grappler, that's a sweet anime/manga, too.
[youtube]http://www.youtube.com/watch?v=czMbsGef2fM[/youtube]