Rated 3 out of 5 stars

It works, but I thought it would have hotkeys. It's useless to me without them, so I'm uninstalling.
If you can type, it's very slow to use the mouse.

Dear Bathsheba,
You can activate the hotkeys "Alt"+"1" to "Alt"+"9" in the Add-on's options/settings page.
When hotkeys are activated and the compose window has the focus, you can press and hold down the "Alt" key and press one of the keys "1" to "9" in order to insert the standard text located in the correspondig position. E.g. if you press "Alt"+"6", the standard text located in position 6 is inserted.
Regards
C-E