One of the most useful features of Milestones PM+ Premium Edition is the ability to make use of advanced project templates. With the Premium Edition, if you have any custom field values populated in your template, these field values will remain in place when you export your project to create the template. Subsequently, when you create a project from the exported template, your custom field value will pre-populated as it was in the template.
In addition, the Premium Edition allows users to keep the project, milestone, or task assignment during the export/import process. They may select the owner to be the person assigned in the template, versus the person who is creating the project FROM the template.