I have been using this plugin with WordPress for many years, and it has served me very well.
A problem that I have know of for a while (years) though is that if you have an existing table on the page (for example, 3 rows x 2 columns), and say you click in the middle row (as the top row has a heading) and then click the ‘Insert Row above’ button, then the HTML <a> tags (but not content) from the middle row (if they exist) get duplicated in the new row. For example, if in my middle row in one of the columns I have a text link to a PDF file (eg. <a href="docs/myfile.pdf">My file</a>), and I click in that row and click the TinyMCE Advanced button ‘Insert row above’, then the new “blank” row, when you look at the HTML source in the WordPress editor, will look like <td><a href="docs/myfile.pdf"></a> </td>.
So I thought it was about time I let you know about this. I thought perhaps it was because the main site I use the plugin on was running an old version of WordPress for longer than ideal (needed to support IE6 in Admin still), but I have since upgraded it and the problem still exists. I would love to provide an example for you to replicate this issue, but aren’t aware of any good way to do that…?