Open Office and Libre Office certainly are usable but they really have their shortcomings. Writer, for example, doesn't format well. As much as I've grown to dislike it the official Word is really the professional standard. And how expensive the books and tuition is is all the more reason that $100 is quite a bit, especially for students like me who have a very tight budget in lieu of a thousand+ dollar Macbook. However, many schools including mine do offer student subscriptions for software including Office 365 and Office 07 for older systems/offline installs. Still, I won't use Office Online out of principle that they are only doing this so they don't lose more people to Google's service. I will continue using Visual Studio Pro extensively though.