I like how easy it was to use, not much configuration required for our needs (we track about 300 different domains).
Easy integration into Google Analytics as well - we can easily see which pages are getting traffic from extrawatch vs standard GA reporting! Reporting could be more user friendly but overall this product works great once you get used too- no issues so far!! Great solution if your looking at tracking multiple websites or monitoring internal sites/domains without having lots of people dedicated solely towards doing just one thing only :).