I'm going with Bard. I like stuff read back to me. Readplease, Speakonia and balabolka are my favourite softwares for that, but they are all windows (through wine). Bard is exactly what I need to not spend time ogg'ing text.
Pronunciation is ok-ish. I liked the fact that the PND is on the official website of them.
It was really hard to choose. What is not to like about being able to calculate 2^640? Or teaching my kid electricity foundations with the Qucs circuit simulator, or coursera. Of course, there is stuff I feel I can not rate because it goes way above my head, like the 3d printing and a new os... I know that stuff is hard work to get it working, good job all.