I loved Office up till version 2010, at which point we (the educational agency I work for) switched to Google Apps for everything. The last 2 years have made me appreciate the "always there exactly as I left it everywhere I access it" of the Google solution. The fact that its free for us (educational agency) didn't hurt one bit either. Re buying all those Microsoft licenses every few years got old.
I'm sure Office365 or whatever has a lot of neat stuff, but quite frankly its not free, probably full of bugs (since its new), probably still somehow bloated, and therefore still not worth it in comparison.
I'd never go back to office in a million years.