I tried a few different TTS plugins on wordpress, and from the point of functionality, this one is my winner. It does what I wanted it to do: to have a simple button at the post and when clicking it, reading the post. Works perfect!
However, compared to some other engines, the voice still sounds a bit mechanic. Also if you run a site with multilanguages, the disadvantage of this one is that only speaks english.
What could still be improved: It would be great if there is a possibility to hide the audio button on the main site, and to only show it when the post is open.
Nevertheless, overall I think this plugin works pretty well!