I started using Genie BU Manager when it was mentioned on Donation Coder.  I used Timeline, but removed it from my computer as it was very intrusive and really slowed the computer down when it was running.  There are plenty of better solutions to mirror files.  More recently, I am trying EaseUS ToDo Backup Free 3.0.  This is a relatively new program (China), free, and has characteristics of both Genie BU and Acronis.  So far, seems pretty good.