My “free” 5GB SugarSync account expired recently. As of early 2014 SugarSync has moved to a paid model. I started using SugarSync about 3 years ago when my wife needed a way to sync files between our desktop and her laptop. I was already using a DropBox account to link my home computer and my work laptop and did not want to try to link two free accounts. There are workarounds, but it was easier to use SugarSync.
Will SugarSync’s be able to survive as a paid service? It will be difficult to complete with Google Drive (15GB free), Amazon Cloud Drive (5 GB free), and Microsoft OneDrive (7 GB free) as well as many others including DropBox. SugarSync has a user friendly interface and robust syncing options allowing the user to sync multiple folders to different machines. In the end, as push has come to shove ($60 GB for $74.99) we have chosen not to join the paid model.
Given the small number of files we need to sync with this account, we are going to use a free 2GB DropBox account for the laptop and the web interface for our desktop as needed.