The tool is easy to use, has several options that can be easily adjusted as per your needs and requirements. I like the way it works with my Google Chrome browser, It shows me the list of domains in red which are blocked by filters or firewalls at work place. Sometimes it doesn't show you all and gives only partial results. So sometimes it's better to go online and look up what blacklisted sites have been reported before. At least then we know whether there was any specific reason why they were banned from our network. We're solving the problem of blocking unwanted websites while using public wifi (at home/office).