it supports just its own version of linux (TuxedoOS, based on KDE) and Ubuntu. I use Majaro and I have to tweak it the same way as I would do it with any other non-linux computer.
I had a problem with sound and needed to send the computer to germany so they were able to check at it and fix it (replacing the mother board). Client service is good, but I live at 1w distance of germany (france)… what happens with people living far away?