It's a scam though. At the bottom of the page it links to site HonestEOnline as a way of "confirming" that it's safe. But if you look closely, you'll find out that both HonestEOnline and the Job Interview Secret are owned by the same person.
Another way you can tell the site is not reliable is by the fact that they claim you will never see a lower price on this product that this, but as soon as you attempt to close tab/window they come around and offer you 51% discount.
Edit: On the other hand, there are some good articles on the site regarding interviews. You wouldn't need any of them if there was a surefire 2-page document as they claim, but giving credit where credit is due: http://www.jobinterviewsecret.com/jisarticles/job_interview_secrets_articles.php