Don't buy it if you're looking for a product similar to Sony Vegas. Movie Studio is a watered-down version of Vegas that has a horrible looking interface. I bought it thinking it was a renamed version of Vegas 13 and then refunded it because of how confusing it was and how many features it lacked from Vegas.
i have 12. not sure of any changes but i like 12.
Windows Movie Maker is all you really need, and it's free. Ask any video-maker that is worth a damn, that's what they'll tell you too.
what?who will ever tell you this?