I tried this add-on on some ebooks out of curiosity, and was pleasantly suprised by how well it performs.
The ability to change the speed and pitch are very nice.

It's very awesome but too bad that it doesn't support Persian language.

tấu hài đó :V

It does nothing! It only shows an error report: "obj is null" and "master is null".
Great flop!

The voice for this thing is terrifying. Sounded like Stephen Hawking and it scared the living hell out of me.

Should have voice selections. Should have volume control.

Very cool people behind the proyect, useful add on to learn languages

The default voice is garbage, but once you get the google voices setup, this thing works amazing. Can't believe how good TTS has become over the years. Thanks for the addon!

only free for a few uses. After that it stops performing and requires you to pay $4-$16. Waste of time. Will look at other apps that are actually free.

Great tool!

Absolutely brilliant!

Mala calidad del audio incluso cuando se utiliza las voces instaladas en el PC

It stopped working :(