Do not be fooled by "Free"
This is a truly useless app. Although it is not stated clearly anywhere in the description, you cannot even view the contents of any file with this app. All you are allowed to do is view a list of the files in each folder...and even then the file names are truncated. If you want to be able to view, download or share a document, you must pay for that feature. It is unclear if there is a separate charge for each of those two "features", and I am not going to pay just to find out.
Even though Syncplicity is more expensive than other similar services, I have thought that the features justified the price. The types of deceptive practices used in this app, however, may cause me to change my beliefs.