I tried it. Hated it. Ok for editing MS documents in the cloud but offline/locally via OneDrive was terrible. Had lots of limitations like 5000 files here, 20000 files there which was a problem for us.

Basic test were ok but as soon as you put any stress on it, I had sync errors, it would permanently stop syncing etc. One of my simple tests is 10000 files in 100 folders of 1k each (all 0 bytes). It struggled to handle it.

Improvements have been made and I know they were working on bringing it all together as OneDrive Personal and OneDrive Business (or whatever terms they used) were completely different applications. The latter basically being an interface to Sharepoint.

So things may have changed in the past 12-18 months, but that was my basic experience.

Edit:
I tried a *lot* of cloud based file servers (Dropbox, Box etc). The biggest issue was most don't have folder/file level permissions so I couldn't have say a HR folder restricted to some people only. Ended up using Seafile on a homebrew VPS - it doesn't do the permissions either but we're small enough for now.