The framework covers most of the non-functional needs a business application has, out of the box. These are capabilities like "Soft deletion", "Audit Log", "Row Level Security". In its nature as a Meta-Framework (building upon existing Java Libraries & Frameworks), it has a rock-solid basis. Spring, JPA, Vaadin as well as Gradle are in itself very mature and powerful. As CUBA is also a Full-Stack Framework, covering all the aspects of building a business web application, it allows you to speed up the development of applications easily by the factor of 2-3. This is achieved on the one side by the fact that what you develop - you will develop faster. This is mainly achieved by a lot of good (business-app required) abstractions and also because the code generation of CUBA studio frees you up from typing a lot (and testing it). On the other side by the fact that you just don't need to develop certain things on your own, that you would otherwise have to implement with non-trivial sub-project efforts (a good example of that is the "generic Filter capability for Tables / Data Grids). Another example is the reporting capabilities that are shipped as an open-source addon. For the dedicated business logic, CUBA does not at all stand in your way. In this respect, the code that you will write is almost exactly the same as any other kind of Spring application. It might just change your mind in terms of what you associate with the term "business logic" because a lot of code that you have previously written is just gone (because of the above-mentioned points). CUBA lets you focus on the really important things in business applications: encoded business rules that drive the ultimate purpose of the business application at hand.

The Framework is absolutely fantastic and an a great balance of RAD approach

It has fantastic balance of RAD approach, power of framework features and openness. There is no limitation, application can be fully customised. Fast development in nice enviroment. Connection with database.