Right, the point they're making is that the Linux devices are more costly, despite having a free OS, compared to cheap Android tablets, for instance. It's a markup that Linux-first devices can't avoid because they just can't sell as many devices (because Linux is less popular), so they have to go with a higher per-unit price up front to recoup costs and make a profit.
They lack the economies of scale that allow them to be sold for cheaper.
I use it. Its not great. The touchscreen will freeze randomly requiring a reboot. Sometimes just a reboot isn't enough. U have to unplug it, shut down, then it'll work. Its good otherwise. I can run 100 minecraft mods just fine