The tool is very easy to use, but there are many other tools with similar functionality (such as Censys). If you need an accurate list of domains that your competitors own then this can't be beat! We used it for several months before making our decision about whether or not we should buy another domain registration service from someone else who could do more than just check ownership records against WHOIS data - because at least in theory they would also have some kind of insight into what those companies were doing with their registered TLDs etc.. But no one comes close either now by looking up registrations through WATO/WiTO ACE!! Easy access to registrar information such as nameservers assigned and contact details which means less guess work when registering new subdomains / email addresses online so fewer customer support queries too. And all.