I'm mainly using it to sync pictures off my phone and my shopping list to my phone. This is the first time I've used an automatic sync tool for pictures, and it's fantastic (before I used FolderSync with SSH, but didn't set up frequent sync for pictures). I've also used it as a backup tool -- there was a lightning storm and I synced my working directory to my phone, which wasn't connected to anything physically. If my computer was hit by lightning, I'd at least get to keep all my files, up to the last time I saved. I'm running btsync as a separate user to mitigate the risk of compromise of the BT server, but if it's open sourced and proven over time, I can run it as my own user, and that will be a lot easier. (I had a similar setup with FolderSync because I needed to store the SSH password on the phone, which is easily lost etc, so I used an "intermediate" user) Still using Unison for syncing home directory, music and work files between computers, BT sync doesn't really bring anything new that Unison won't do, discrete syncs is totally fine.