I like that it provides an easy to use interface for creating, managing and deploying web applications with many features such as MVC frameworks (Web2.0), authentication/authorization, database management, caching etc.. There are some bugs in the application but they're being resolved as you read this comment. It has helped me create several apps quickly using these methods without having to deal with all of the tools myself. We have used it to develop our main product "Hix" which is web-based software that helps people manage their health records.