The Best thing is that it helps in reading the long text without glaring to the screen, and help in multitasking where text to speech can do all the readings to you and you can divert that time at other work
The voice quality is the main thing I like. The speech sounds clear and natural, and there are enough voice options to choose from depending on the use case. I also like that it is fairly straightforward to integrate into an application using Google Cloud APIs.