I’ve heard that the max score for this particular test is 180. It means that it can only measure up to a score of 180 (accurately ?) and the precision of the percentile of the score is only to the integers (ie: 98/99%). And yup, there are actually quite a lot of people (who I know) have gotten around 160-172. So, if we want a more detailed report like what does the score means or a more precised percentage (with decimals), then we have to try others. However, the one that we took is already fairly accurate.