Indeed, the presentation, the whole atmosphere of the game is just great. It makes a boring sport (for me, at least) looks very fast and intense.
Do you know the baseball game from Konami for SNES? I discovered this one thanks to emulation, and I loved it too. Not as good as Baseball Stars 2, but pretty good. I don't know its name because it's all in japanese, but the presentation is a lot like International Super Star Soccer.
It seems like Konami has a tradition in Baseball games, as they made 3 for the MSX (Including both Pennant Race games), at least this one for the snes (But I think it's actually a series), and they have a series of baseball games for the GBA too.