I like that it's very easy to use, it has all what is needed for tracking user behavior in web applications or websites. It also provides good reports with graphs showing how many times each page was visited by different groups of people (by country). There are no downsides at this moment - everything works as expected. If there were any issues we would have encountered them long time ago because they fixed most problems quickly after our feedbacks. So far so great! We're using trackmyusers solution since last year and never been disappointed. The tool helps us identify where does traffic come from and what kind of visitors do visit particular pages/sections within our website.