Well let me start off by saying that, as a Brit, i've never really had much interest in Baseball because we don't have it over here. Therefore, i don't know ANYTHING about the rules, the players, the positions... I think the only thing I know is that "koushien" is where all japanese baseball players want to go.
However, i have been bowled over (no pun intended) by the amazingness of this anime, and am sure to continue watching it.
Usually, you'd expect a sports anime to be for guys, but I think that this one is pretty effeminate (and BL fangirls, there's been A LOT of moments so far, eg "If you're with me, you'll get to feel good as much as you want!")
So... basically, go and watch it, if not for the sport, but for the comedy and the story :D