Almost perfect, almost.

Does what it says and easy to manage. The best part is that it works globally across your site, and doesn’t clutter up your text with shortcode. Needs to include the < and > characters in its character ignore list, though. Otherwise, code tags touching the target word in the text editor cause the tooltips to not show up for that word. I would consider that a bug.

For example, with the following code ORT won’t get a tooltip, but AFR will.
<li style="text-align: justify;"><strong>ORT / AFR Trend</strong> – Displays the ORT rolling Annualized Failure Rate trend by fiscal workweek.</li>

Less on the bug side and more on the feature request side, I think the author should also consider adding the ( and ) characters to the ignore list, as the plugin won’t work on target words in brackets, either. Better yet, how about a customizable ignore list of characters that we can add to, ourselves.

Like I said, almost perfect. I would highly recommend it as a nice, simple way to add tooltips to your text. Thank you to the author for developing this free plugin.