The ease by which we can define our own routes easily without writing any custom route mapping rules (using URL Rewriting).The service stack has all needed features out of box like : authentication/authorization etc., I use this to build RESTful webservice in.net C# using JSON format data as output from my database table into XML file or HTML page so that people could access it through different OS systems too with proper formatting done automatically at runtime itself! So far everything worksβ¦