Could not get it to work. Got error msg: "ERROR: This plugin needs Multibyte String PHP Extension. Please install it." The mbstring php extension was enabled, the server was restarted, etc etc, but error continues to pop up, unable to configure the plugin and get it working. Even if after all that I could have gotten this plugin to work, I think they should have a warning up front that you will have to leave the WP dashboard and perform some backend server configs to enable the plugin.
Almost all hostings we worked with have mbstring extension installed and enabled by default, this is a common setup. Also if problem arises in rare cases, this is is usually easily resolved in a hosting panel.
If you need help we can resolve this problem (send private msg), or we can arrange a refund.