JOHN LOACH  I own three products now from ProSoft Engineering - Drive Genius, Data Rescue, and Data Backup. All three work exactly as described, with a very professional appearance and great attention to getting the job done.

Data Backup is fast. Once you've created the initial backup, the subsequent version backups are fast and accurate. Restoring files from version dates is very easy and quick.

Support is excellent, too. Good customer forum, and updates are always worth the investment.   
(Version 3.0.4)