Hi, From faq on JSF from sun site : Ease-of-Use: Several aspects of the JavaServer Faces architecture contribute to its ease-of-use. For one, JavaServer Faces technology offers a clean separation between logic and presentation, enabling a wide range of users -- from web-page designers to component developers-- to take advantage of JavaServer technology, resulting in a division of labor and a shorter development cycle. Also, a user-interface created with JavaServer Faces technology handles all the complexities of user-interface management, including input validation, component-state management, page navigation, and event handling. Standardization: JavaServer Faces technology is being developed through the Java Community Process, under JSR-127. Several prominent, respected tools vendors are contributing members of the JSR-127 expert group and are committed to supporting JavaServer Faces technology in their tools. Device Independence: JavaServer Faces technology is designed to be flexible. By defining only component functionality in extensible UI component classes, the JavaServer Faces architecture allows component developers to extend the component classes to generate their own component tag libraries targetted for specific clients.