I like that this is an extensible framework for building apps to your own design which is what I care about most. The documentation is very helpful and easy to understand. I have used this to build several applications such as a ticketing system at one point where we had more tickets than we could handle. It was very helpful in getting our users onboard quickly and able to use the application right away without having to go through training or learning how to use it. There are some problems which I believe can be easily fixed though. For instance, there is no way to put buttons or other UI elements on top of other UI elements. This causes a problem when trying to make a multi-tabbed interface. Also, if you do want to customize the look and feel, there is no good way to accomplish it. Just use it as is and don't expect all the customization.