I have no experience with them, but I took a look at the website. The website seems legit. It has proper grammar and spelling and lists authors to whom they've helped. And the $120 fee they charge for a year does not seem unreasonable. And if they wanted to rip someone off, they could do it for a lot more. But, it seems like this service would be more useful for PA books or POD books, which this company does accept, which is also a bit of a concern, because PA books are not usually edited correctly and very often poorly written. Granted, the company has an "acceptance" policy, but who knows how well organized that is. PA claims to have an acceptance policy. Plus, a book published by a legitimate publisher would not need this company, as the publisher would do all the marketing for you.
My personal advice? Most books are not sold online. People still like to go into a bookstore and flip through the pages, read a few chapters. You're better off spending your $120 on postage to send query letters to legit publishers.
Of course, I am not an expert on the subject, so if I'm wrong on any of my assumptions, I trust those wiser than me to let me know.