This module lives up to its "Simple" name, but is very flexible and customizable as well. It has all the features I could need and flawlessly does what it is supposed to do.
I have a project where I needed to implement Apache-style routing from an httpd.conf file. Of the various "routing" modules Router::Simple was the easiest to map to this particular problem – and so far it's been more than flexible enough.
The other similar modules (listed in the Router::Simple documentation) have other features, but Router::Simple was by far the easiest to get started with and to understand/debug as I was getting my application working®.