First off - I like the concept here. It's easy to use and come with only the options you'd need. The shortcodes are handy.
However, the plugin's native widgets have never saved for me. I always receive the 'Are you sure you want to do this' message and no saving of my changes . . . like the widget title.
Separating the Quotes from their options makes it hard to teach folks where to go to update their settings.
I have used this before in project but never without tinkering.