The best feature is that you can access your documents from any location in real time with no lag or delay! It works well for our business needs but there are some minor glitches here-and -there which could be easily resolved by their customer support team if they have one (of course it would help to make more improvements).
This service has made my work easy as I'm able to manage all of my client files online without having them stored locally at home/office where someone else may take advantage over me while working remotely etc.-.