We use OneDrive at work and I think it's awful.
My biggest complaint is how slow syncing is some times. I have a desktop and laptop at work and I can save something in my OneDrive folder on my desktop and it'll take over an hour for it to appear on my laptop unless I manually pause syncing and then unpause it to force a refresh from the OneDrive server.
I've never had that with Dropbox. It's been damn near instant every time.