Sophos home premium FREE is average, their signatures are decent enough , web protection ; phishing filter sucks thought, you get access to their dashboard and can block certain categories completely , it does some caching and gets faster, you can also install it to family members computer and run scans on those computers throught dashboard
Its perfect software to pair with pretty much anything
I would use it for family filtering only + local av and then pair it something like comodo firewall + trafficligh/ netcraft
Their mobile antivirus is completely free and offers alot of protection modules, wich is suberb in my opinion