Google Docs vs. Microsoft Word

Once I had my hard disk of my computer broken, and I got a new one at last. But I lost some of my important files then. I did the backup, but who can backup the system every minute? After that, I turned to Google docs, the member of Online Document Service family. You may ask, are you giving up MS word and relying on Google docs? It's hard to answer. Because both of them have advantages and disadvantages. Let's see...