Sublimall doesn't require third party software. It's open source and respect privacy. It's integrated in SublimeText.

Thank you for testing!

How is Sublimall not third party software?

I go one step further and sync the entire Sublime Text 3 user directory on OS X.

mv ~/Library/Application\ Support/Sublime\ Text\ 3 /path/to/cloud

ln -s /path/to/cloud/Sublime\ Text\ 3 ~/Library/Application\ Support/Sublime\ Text\ 3

If you are using more than one platform, this can lead to bugs with packages. See https://sublime.wbond.net/docs/syncing for more info.

Same here. What feature would make me want to switch?

that fact that you can login/logout with super+shift+p and load the settings instantly to change between workflows or to do some quick changes on your friends laptop

Pretty much this. Dropbox works well enough, but this is just a gradual step forward that makes all the difference in my opinion.