I'm currently doing all of my digital drawing on an old SP3 tablet running Manjaro, via Krita. The driver support is... acceptable, I guess. Krita has more than a few annoying edges, but shows a lot of potential so I've been sticking with it.
For a long time I've been considering springing for a dedicated setup with one of Wacom's larger devices, but I've held back because I need it to have completely solid Linux support and I can't figure out how to test that in advance. I'm always curious to get more info about what issues other people have seen.
I wish I could find a physical store where I could just bring in a laptop, plug it into the actual device, and draw for maybe an hour to figure out if there are any dealbreaking problems.