I like how easy it is to use, especially when you have multiple users who can access one account simultaneously because of its robust security features that are constantly tested by experts from around world! The interface could be more user friendly but this will surely improve with time as they continue improving their service/software platform even further (such has been my experience).
Great software if your looking at something simple yet reliable which allows different people within an organization or business unit manage files such documents etc without having them scattered all over place - saves so much space too!!