Really like this extension. Been struggling with the kids getting distracted while doing school work. This was easy to set up and easy to use. Whitelisting is so much better than depending on filtering. You really have to lock down everything else on the User's account like browsers and Store, but this extension saved me so much time. Would like to see some changes and additions in UI like editing URLS and the import/export doesn't work great but it is blocking and allowing the correct sites.