How can I be sure
Sitescore is a free tool which rates how well designed, popular and accessible your website is. The entire testing process is handled by advanced computer software, which means a test is free and only takes a few seconds. Sitescore also gathers user feedback on all the websites we rate, to help judge how appealing a design is how Sitescore works.
Have a go yourself: http://www.silktide.com/tools/sitescore Below is this sites score!