The unique 'document based' approach lets you save a lot of time versus the 'utility' approach. In the utility approach usually the user have to drag and drop the source to use to make the archive, specify where to save and the name to use.
This anytime the user want to create a new image archive.With DMG Master you save all your setting in a document. You can save and use as many documents as you like.
When you want to create a specific image archive with various content placed anywhere in your hard Disk, also in different places, you open the document and press the button.