I bought a Huion tablet a few years ago and it never worked. There was an issue with the wacom driver. I found a typo and put an issue. Well, it was a typo or the MFG changed something. Anyhow, It did work on Linux except it was like a really big mouse pad with no pressure sensitivity. Worthless. I was using it for a dustcover. :)
I contacted the manufacturer to see about it and they replied it would never work with Linux or FreeBSD because it requires their proprietary drivers and if I wanted to use it I would have to install windows.
Today I tried it again just to see and now it seems the open source driver is updated and the tablet works, pressure, buttons and everything. So I suppose the manufacturer was confused about reality. 'never' means like not now i guess and not never ever.
So now it's possible to buy a cheap-o Huion tablet (around $45 USD for a 10"x6") and use it with the open source Wacom driver. Wacom tablets are very good, but out of my budget :)
My daughter tried it out in Krita. Works great on dual monitor display, just have to go into wacom settings and set the display for the tablet to use.