I learnt to use DW by building an open source personal budgeting app[0]. DW really good and awesome. No whatsoever bytecode manipulation problem.

Everything work great. If you learn real work DW app, see my open source project.

Stack:

1. AngularJS 1.x as frontend

2. DW as REST backend

3. Hibernate as Data Access Layer

4. PostgreSQL as DB

[0]: https://github.com/paukiatwee/budgetapp