As a student, I get access to some software at discounted prices. I bought a legal copy of Windows 7 from Microsoft for $30 at win741.com.
I installed it the night of the release a week ago. I installed an early beta version some time ago, and it didn’t impress me much. This, so far, is the best OS Microsoft has released. My favorite part so far, is the ease of access to media and Windows Media Center itself.
Still playing with it, though, so I’ll update when I run across problems… there has to be problems.