About Matt
Most average home users aren't offered a good, solid file backup solution. See, the problem is, backups are often designed for enterprise or "technical" users, so they're hard to use or really complicated and expensive. Others, like Windows' default Backup utility have very limited capabilities.
If you've ever used it, you know that it lets you backup "Documents," "Music," "Pictures," and "Email." ... which is a joke. How does it know where you store all your documents? What if your music is on a portable device? What if your email was web-based (like Gmail or Yahoo)? Obviously, these options are misleading and can have majorly bad consequences when you need a backup and realize some of your data is not there.
So here's a program that is capable, flexible, and reliable. Because it backs up your data just as it would as if you manually copied the files, it works reliably. There's no bulky compression or risky encryption (if you want good security, look into TrueCrypt or BitLocker).

Version 1.0 RC1 will be a more stable and usable build.
Certainty 1.5 will feature a more beautiful and simpler interface among other things: multiple destinations for backup, more powerful error recovery, general minor improvements.