I'm pretty sure it's been tested and proven to be safer than a regular helmet. Also it was made for people who don't like helmets or kids who think it's not "cool"
I feel like there's multiple ways this thing could be shifted out of place easier than a regular helmet (particularly on the forehead), fail to deploy in time, and leave the person vulnerable to injury or death. But at least their neck will be better protected, so we have that
I highly doubt that. It's been designed over the course of seven years. I don't think they were just rolling their thumbs during that time. In case of an accident it deploys in 0.1 seconds. It's also been proven to be 8 times safer than a regular helmet by reducing impact force and covered area. This study was made by Stanford university, so it wasn't some backyard biased testing either.
https://hovding.com/
https://hovding.com/