This is a simple but very useful plugin. The only teeny issue I had with it was that the 'configure' link for configuring the settings doesn't appear unless you hover over it so I had to check the screengrabs here before I realised where to find the settings page.
Also, after activation I visited the dashboard page to add a note and I couldn't edit the text in the note (hence why I wanted to check the settings page). According to the settings page I had all the appropriate permissions, but upon saving the settings and going back to the dashboard I could edit the text and save my note, so no panic there!
Overall an incredibly simple but also incredibly useful plugin :) THANK YOU to the Author!