Debug and troubleshoot rewrite rules easily
One of the very cool features of URL Rewrite Module is its integration with IIS Failed Request Tracing. When you have rewrite rules that do not work the way you expect them to work - enable Failed Request Tracing and you will get the entire history of how rewrite rules were applied on the requested URL. I use Failed Request Tracing all the time and it has proven to be a great help when debugging and troubleshooting rewrite rules.