This article isn’t designed to trigger a “mine’s better than yours” war, nor to convince you to change your current antiviral software.
I have BitDefender Internet Security 2013, so… I can tell you I haven’t had any problems with the software, and none related to SD software, specifically.
It’s more in the direction of this is here if you need it, and for folks with older machines without the ‘liquidity’ to get another soon. It has very little effect on your system resource...