I can speak from my own experience: in cases where workstations are switched every year or so, one drive makes it very simple to keep things synced, even for very large files. This is even true for large files (such as video or CAD files) that are enormous.
SmartVault sends out a cover letter with the tax returns that includes a link for them to download their tax returns, avoiding the insecurity of an email attachment. It does not include a statement retrieval feature but does work very nicely with a third-party app called FileThis. The majority of the users in the office have not been able to install the Outlook plug-in due to "a certificate error." In five years, SmartVault has not addressed this issue.
I like Box better. If you sign into Microsoft using a personal account, be EXTREMELY careful. All of your downloads could suddenly be available to your entire company, and that is incredibly embarrassing. Did that happen to me? Not going to say, but just always check which MS account you sign into.
Using OneDrive is very intuitive and has been improved over the years. It's just like using native file management on either your Mac or PC. It's drag and drop functionality is easy and it clearly shows when files are uploaded to the cloud or if there are errors
It has a good performance, the pages load normally, access to the files, management, reports, everything is working well. With regard to integration with other systems, we have not done so yet.
It's a Microsoft product so there is a wealth of information online both from Microsoft directly and from millions of users but as a corporate user we also have access to direct Microsoft support through a variety of avenues (phone, email, etc.). This makes finding answers to issues more accessible, however, it does also mean that any new feature requests will get buried.
Reaching someone is more difficult than it should be. Also, they don't take possession of known issues always suggesting it is a local PC issue in initial conversations. That, of course, can be frustrating for the end-user.
Box is another file-sharing application that is very similar to OneDrive. Box falls short of OneDrive in its syncing capabilities. OneDrive is very quick with syncing so you never have to be concerned that you are not using the most up-to-date materials. Box was always a bit delayed and did not always accurately sync across systems. OneDrive benefits from being backed by Microsoft, so you expect the connection across applications that it allows. OneDrive also provides consistency for use and intuitive understanding because of that Microsoft consistency. I'd prefer OneDrive over Box.
OneDrive allows us to save much time on creating and archiving backup copies of our data. Microsoft gives a guarantee on the possibility of recovery of files or folders even from 30 days ago. It provides a great comfort of work.