I love Ubuntu One and I use it all the time. I have my documents and music composition folders set to sync. It's been a real boon. However, sometimes I feel that constantly saving my progress forces the file to sync dozens and dozens of times to the servers. It seems wasteful to me so I've been disconnecting U1 until I'm finished working on a project.
Is this an unnecessary action that I am taking? I know it's using Amazon's storage but I'm still paranoid that I'm costing Canonical money when I constantly save my progress.