It works simple and with profiles.
Really great to see this.
Can work with Dropbox, Google Drive and Box.

Can be synced by hand, automatically every x minutes etc.
Works great (used it now for about 2 months).
I use it on 4 machines and 2 are constantly running (24/7) and still it does not make a mess out of the favorites.

And best of all, no website login, monthly fee etc. needed.

Good job