I like that this tool has been around for years, and it's still reliable! It can find an address to send mail using your own domain or third party domains too. This was helpful since we were sending emails with our main business account but wanted them sent through another (more professional) one instead of just gmail so more people would be open in receiving those messages without spam filters getting us blocked first. Not much dislike except maybe they could add some features as well such as multiple addresses per file. But overall its very useful if you're trying to contact someone who doesn't use their full personal information online yet. The benefit here being able to put whatever info into just 1 place where there are other users searching at all times rather than doing research yourself each time - saves a lot of work.