I bought it on Monday, but things have been kind of hectic and so I'm holding off on installing it until this weekend. I don't want ANY distractions.
My only worry is that while my computer (a 2004 Sony Vaio) meets most of the recommended requirements easily, I have only a puny 512 MB of RAM, which is the minimum required amount. Also, my video drivers are probably way out of date, but that can be fixed with a few choice downloads. Still, I should be fine on medium settings, and if worse comes to worse I can always go low.
I've really been looking forward to this. I'm hoping for something close to a religious experience