Been using dropbox for several years now and still finding new uses for their service. Where they lead many are following, but I'm still to find better.
Databackup, online storage, file transfer, document sharing, etc etc etc.
My most recent use has been dropping icloud for photo backups and switching to dropbox camera backup via their iOS app.
What I like most is the simplicity. I'm pretty old school and like to be able to see folders and files. Call it transparency for want of a better word.
Great service. I dont give 5 stars lightly....