Most of this plug appears to work.
The one issue we have encountered a number of times is that whenever any of a number of other plugins are updated, the widget for this plugin experiences issues. The widget shows up on the page, the title in the widget is there, but the calendar that should be there to pick a date from, doesn't show up. It could be an issue with the other plugin, .... if it wasn't so many plugins that it conflicts with. Remember however, the problem doesn't stop the widget, in only stops the calendar in the widget. I'm not privy to the code, and even if I was, I would only screw it up; so I'll leave it to the author. I'm sure it's not that big a deal, just a persistant nuisance.