I am a serious office 365 subscription user. My plan is the near top enterprise e3 plan.
I really think office 2011 for Mac lacks too many features compared with office 2013. Now, this version can finally do some decent job. And more important, this preview can finally open document stored in my office 365 account, without doing anything much.
Until now, except update issue, I didn't encounter any serious issue preventing me from using this preview. But word performance is still poor, especially when opening files with many tables/figures.
Since I will keep using subscription until the day I may not be able to use it, I don't mind how much Microsoft will charge on standalone product.