What really makes this tool shine is the Heatmap. The Overlay and List views are in comparison pretty boring and for that you might as well use standard web statistics tool for that. I'm not going to explain what the Heatmap is. Just look at the attached screenshot from a report I've made based on www.issuetrackerproduct.com
What can I learn from this? First of all, the most exciting thing is the screenshots. A couple of things about that:
The other interesting thing to discover is that people click on subpages of "Documentation" without clicking on "Documentation". I've been critisized for showing the sub options of Documenation before you even click it. My argument was that it would be good to show the options that follows without the necessary click for people who scan for the word "Installing" rather than thinking structured that "Installing" would be part of "Documenation".