This is a nice little tool that is very easy to install and has a nice look and feel. You can choose a list of domain extensions (.eu, .net, .us, etc.) to include in the checker. However, I checked some of the results the module returns against the official domain checker (checkdomain.com) and, unfortunately, some of the results did not match. For example, the module returned my own domain as "available". So, be sure to verify the results.