I didn't know there was such a device until I saw a report on the news this morning about a flight being diverted because two passengers got into a fight over its use. Anyone use one or seen others using it on a plane?
Here is a related story as well as a very strange video I found regarding the incident.
Knee Defender - Business Insider
https://www.youtube.com/watch?v=DeWxzd0d-3c