I have used this product in the past on Blackberry and now I have just started using the premium edition once I realized that Quickoffice HD is no longer available for download in the US Apple Store. I have linked my cloud services (Dropbox, SugarSync, Google drive, OneDrive) to this Documents to Go app. There is no easy way to drag and drop files from my clouds to my local iPad folder within this Documents To Go app. Each file needs to be opened then you have to save the file which involves following the path back from the location on your cloud to the local iPad location.
Also there is no way to create folders on your local iPad folder so if you have numerous files it will become a mess.
This was a good feature of QuickOffice HD that was to be admired.
Doc2ali about Docs To Go Premium, v5.2.5