Self-Study vs. Classes

'Sup /lang/.

Which is better when learning a foreign language? Self-Study or classes? Which do you prefer?

I'm assuming that you live in an area that is sort of peppered with Spanish, on TV, people etc?
As a citizen of the internet, of course :D
I do know a few Spaniards and South-Americans, but their German is far better than my Spanish, so we usually speak that, except if we don't want the people around us to understand what we're saying. But it's nice to have someone whom you can ask about pronunciation etc.
That's pretty fast going speed with the ol' nihongo, too.
Why, thanks. I've had lots of spare time this and last month, you know.