Those agents did such a wonderful job making and deploying this page that the testimonials are unreadable because each spot has two of them overlapping.
However, Vivaldi on Linux renders it correctly, so I assume that it probably works right only in Chrome and completely compatible browsers.
Unfortunately, there are still a lot of Web sites that work right in a single browser, usually Chrome, so I always must keep around at least 2 or 3 different browsers.