I bought Chronosync a few years ago. The best thing: Chronosync is really great and can do evereything you want (concerning backups). Furthermore Chronosync is reliable: As Chronosync does not encode your backup or write it down using a proprietary code, you always have access to all your files (even then, when you do not have a copy of Chronosync installed on your computer). It's also great to let Chronosync move your older backup files to an archive so your last backup is always up to date without losing older versions of your files. I also like the fact that all Chronosync updates are free for existing users.