I also only have experience with optar, which worked for me. However, here are some reviews of PaperBak: http://www.codinghorror.com/blog/2009/07/the-paper-da

I also only have experience with optar, which worked for me. However, here are some reviews of PaperBak: http://www.codinghorror.com/blog/2009/07/the-paper-data-storage-option.html http://www.codinghorror.com/blog/2009/07/the-paper-data-stor... http://www.extremetech.com/extreme/134427-a-paper-based-backup-solution-not-as-stupid-as-it-sounds http://www.extremetech.com/extreme/134427-a-paper-based-back...