Terrible accessibility and unless you have some vision or sighted help, unusable. My wife, /u/accessaces, used one for about 2 years for her $1. She recently switched to using a Sony semi-pro HD camera.

The problems with the Go Pro were that the tones were not distinguishable, the voice control was not reliable and the device, software and apps were entirely inaccessible. The camera itself also had reliability problems that meant there was more than one case where she had to reshoot a video because segments were missing or sound just failed.

She's made one new video with the new setup. It seems better but probably too early to give it an endorsement.