This service is a quick and accurate way to gauge the usability of your product, service, or prototype.

Usability.gov has this to say about the SUS: The System Usability Scale (SUS) provides a “quick and dirty”, reliable tool for measuring usability.   It consists of a 10-item questionnaire with five response options for respondents; from Strongly agree to Strongly disagree.  Originally created by John Brooke in 1986, it allows you to evaluate a wide variety of products and services, including hardware, software, mobile devices, websites, and applications. In my personal experience, when senior stakeholders see the scores from a SUS, they have no trouble understanding or accepting them as meaningful and legitimate. This has been incredibly helpful for me when trying to convince stakeholders how demonstratively good or bad the usability of a system is. It’s also very helpful to establish a baseline or benchmark at the beginning of a redesign which can be great for comparing after each iteration of the product or prototype all the way to the final version!