I've been thinking of updating my Office (I'm still running 2003!). Looking at Microsoft's web page, they have Office Home and Student 2013 for £110, which would have everything I want. But they also have Office 365, either Home or Personal, for only £80 or £60, which can do more stuff and be downloaded to more devices. So what's the catch? Why is the better (?) package so much cheaper? I can't help but feel I'm missing something.