OneDrive works great on paper. However, in real life, OneDrive is balky, temperamental and uncooperative way more often than a Microsoft product should be. I also use Dropbox, and for people who don't necessarily crave security that is tighter than OneDrive's and/or people who aren't, for emotional or practical reasons, committed to using Microsoft Office (instead of, e.g., LibreOffice), Dropbox, in contrast to OneDrive, just works. Dropbox has its own additional features that their team has been developing, and their consumer cloud plans have roughly analogous storage and features and are similarly priced.