Rated 4 out of 5 stars

Works well. Could really do with a shortcut key to start/stop speaking. A pity that the better-quality voices aren't free.

This review is for a previous version of the add-on (1.7.5). 

Shortcut keys

Sure there are shortcut keys. Details are on the page above. F9 or F12 to start speech, shift+key to stop speech.