It cost like $100 per year,It syncs every folder/file you want to their server 24/7, they have apps for your phone, and "previous versions" (So every edit you did to a file will be saved and you can rollback with few clicks), so basically you have your data everywhere and if your whole house burned down, you still have your desktop online and you can just redownload that shizzle.
Cobian backup with several external drives, and Truecrypt. One of these days I'm also going to set up a sync to either a server I own, or with Dropbox.