Good review. It seems Sophos Home is at least as good as other free anti viruses if not better. Some of the advantages include excellent web block feature, no non sense commercial ads, their signature and detection capabilities are good too and it behaves more or less like a paid software. Their privacy terms are better than most of the free anti virus softwares as far as I can understand.
Sophos Privacy Policy:
Sophos Home Products
We may directly and remotely communicate with your protected devices for the purposes of, without limitation (i) applying policy and configuration changes to such devices; and (ii) extracting usage information, service performance information, and infection logs.
In order to continuously improve the protection levels in the Sophos Home products, it may be necessary for us to collect and process certain information relating to you and to users connected to your account. You acknowledge and agree that the information we collect may include confidential and/or personal data, including without limitation (i) names and email addresses; (ii) account usernames; (iii) IP addresses; (iv) usage information; (v) details of changes or attempted changes to executable files, pathnames and scripts, (vi) infection logs; and (vii) files suspected of being infected with malware. We are committed to safeguarding the privacy of your personal data and will never share this outside Sophos.
You warrant that you have obtained all necessary permissions and provided the necessary notifications to share the above information with us for the purposes described from all users connected to your account.