Users get clear feedback about how their choices are affecting the final outcome before they get to the end. Whenever possible, Wizards use intelligent graphical representations of the end result to dynamically reflect the users' choices. They also allow users to preview their final result before saving. Builders immediately update the object being designed so users can try different choices. Builders are also re-entrant; if users don't like what they, see they can go back into the Builder to make changes.