As far as the desktop goes, SugarSync is very quiet. It sits in your system tray and quietly uploads your selected folders, and downloads whatever you have synced up. On the BlackBerry, there’s a menu option for launching the camera, allowing you to immediately take a picture and save it to SugarSync. This is a nice feature for those who need to share pictures quickly with a private group, especially if running out of device memory is an issue, since it’s sent wirelessly right away.
One major bummer was that the File Vault section is actually just a link to the mobile site. This reeks of Google’s mobile app strategy of sending out home screen browser shortcuts and calling them apps. That being said, the mobile site is solid, and I’d be almost tempted to use it over the application in some cases. It’s a bit easier to get around, as the whole file tree is shown at the bottom, which the BlackBerry app is sorely lacking.