Since I have not used SQL Developer Data Modeling, I have not run into any problems. Howver, the more experience that I will have with it, the better I will understand it. After drawing many ER diagrams, I will begin to use the SQL Developer to create cleaner and better organized diagrams. The transition will have a learning curve to it but I am sure that I will improve over time. Internet resources and asking classmates will improve my understanding of the program.