"The users can see (visually see) which folders occupy the most disk space."

"When a folder is opened, you can see which files occupy the most from the space the folder occupies."

"Users can customize the appearance of the program. Files and folders can have different colors."

"You can select if files and folders size should appear in GB, MB or KB. Also size shown is customizable."

"Toolbar Options : you can leave feedback, use Windows classic file management tasks or do a Google Desktop search."