Great plugin. Works exactly as described.
Unfortunately, it inserts ads from the plugin author on the plugin setting's page which promotes his books and asks for donations.
I support the author's work, and encourage you to support him by purchasing his books or making a donation. However, these ads should not be included in WordPress plugins. If this became a common practice, before long the WordPress admin would be polluted with all sorts of ads.
Suggestion for the plugin author: Include a Hide/Dismiss option so users can choose to hide the ads if they choose to.
Otherwise, keep up the great work!