Being in a hurry I actually paid for a book from their site. You do get a download link, however it's not working. Their phone number is not operational. Their chat is 'online' but there is no reply even after hours of waiting.
That's not the worst part. Turns out they actually buy ebooks and convert them to PDF and resell without authors consent, which was the case with the author of this particular book.
Trying to get them to pay back the money turns out futile.
They clearly have a strategy on trying to seem legitimate enough for that first buy from unsuspecting customer.
One positive review below for example, "you get to speak to a real live human via email and live chat". If only. Try calling their number if you have any doubts whatsoever.
Heck they even have a specific DMCA menu entry in their footer.
I'm surprised google doesn't delist them from their index to be honest.