I have one of these. It's only 'ok'. There is significant ghosting and it's not very good when the scene is dark, but it's much better than my BOOX tablet. I just got it so I'm still experimenting with different uses.

Here's a clip of it playing video: https://youtu.be/povlk3hKTVA

It's specifically says no Linux support. It seems to me that excludes a large portion of tinkerers and those willing to accept the downsides of bleeding edge technologies, which is probably also their target market. Such as me.