PerfectDisk 12 Pro is great, just enable Opiwrite, StealthPatrol, and S.M.A.R.T Monitoring and then just forget about it. I have used O&O in the past and it did a fine job as well but PerfectDisk was my clear choice.
My impression of the free products were, WOW how can anything this simple and work that fast still be as effective. No I don't think so.:dodgy: