Things I like about VoiceOver:
- shows text overlay in addition to speaking
- is built in to macOS
- takes like 10 minutes to learn how to use
Check out https://youtu.be/5R-6WvAihms for a good overview of how to use VoiceOver. I'm only slightly exaggerating to say that I didn't "get" accessibility until I watched this video and learned how to use it.