A quick check seems to indicate that these, too, should work as easily as I say (there's even a tool on GitHub that gives you the same level of control as the official Windows app: https://github.com/GoXLR-on-Linux/GoXLR-Utility).

But I know sometimes it's different in the real world. Kernel too old, chosen distro has a weird audio setup, desktop environment (Gnome/KDE) only acknowledges the presence of the device if it was already connected on boot-up, etc. etc.