What a pleasure!!
It does not return results accurately, for any domain extension. After sending close to 10 support mails, they have unfortunately fallen on deaf ears. I have received support within minutes from developers who don't even charge a bean for their hard work, but these guys seem not to care. They will take your money but offer absolutely nothing in return.
Don't waste your hard earned money.
We apologize for the delay in responding your queries, this was due to some personal problem.
Please provide your queries at firstname.lastname@example.org, we will review and revert you ASAP