The DEMO version only includes 4 pages:
http://reviewfast.co
http://reviewfast.co/api/embed_userId-67e2b874424bf24fc50ac7c1-pageId-67e60ccef0e648f396df8439-theme-light.html
http://reviewfast.co/tos.html
http://reviewfast.co/privacy-policy.html

It is possible to download these free files and install them on your server, so you can test how the site works.
Visit https://www.waybackmachinedownloader.com/en/buy-wayback-machine-downloader-recover/ to buy a fully functioning site.
Go back to the index page