Why not secure feedback on your communications at least once a year with this easy-to-use research scale?
(Download as a PDF.)
Put the title of the communication at the top of the sheet and leave the bottom half blank for suggestions. Ask that the sheets be returned unsigned and make your own interpretations of the results.
You'll notice that the scales swap positions for positive and negative criteria. This forces respondents to spend more time thinking about their responses, rather than providing a blanket rating of “good” or “bad.”