If you have not seen 300, consider yourself lucky. It was a god-awful movie. If you're not already aware of what it's about, you can research that yourself.Wikipedia: 300 (film)
I'll admit that the effects were well-done, but that's just about where it ends. If you're interested in action, you only need to see about 5 minutes of the movie. The fighting scenes are boring and repetitive.
For those interested in history, look elsewhere--300 isn't even meant to be educational. Historians have confirmed that the portrayal of the events and people in this movie are bizarre.
Why is there a bottomless pit just sitting there waiting for an innocent messenger to be thrown down it? What the hell is up with this creepy Gollum guy? Why do the Persians have these huge troll-monsters?
Please, don't see this movie. It's not worth your time and money to go see in the theater (the best way to see it) and it's certainly not worth the time to download via BitTorrent.