I don't trust it. Too obscure. It's bad enough that I work exclusively by email, but very good that I don't have to share anything with anyone except my customers (I'm a a freelance technical editor). I don't want my data in anyone else's servers. I make multiple backups on multiple devices at home. Take a few minutes every night, but it's worth it. Now I don't lose anything and I don't have to have an Internet connection to work -- except when I want to research specific points in the articles I edit.