I've found that using the data-aware components results in an application with no clear distinction between business and UI logic.
This is fine for small projects but as they grow larger the code becomes less and less maintainable.
All the various bits of event code (and their interactions) can become a real nightmare to understand!
Invariably in such cases I've ditched data-aware components and have switched to a (hand-coded) MVC design.
This does require a lot of up-front coding effort but results (IMHO) in a project that is maintainable, extensible and debuggable.
