Works pretty well as in, "Install Monado using your distribution's package manager, set it as your default OpenXR runtime, hit three buttons to get Valve to begrudgingly respect system defaults instead of the closed-source 'Open'VR runtime."
Optically-tracked WMR controllers work, depending on how new of a build your distribution has and the type, but WMR controllers are generally considered to be pretty bad to begin with. You can use a different style of controller with a WMR headset if desired.
That said, building Monado isn't hard if your distribution doesn't currently have a version that supports WMR controllers. The repo lists all of the dependencies you need, and what they're called for popular distros. It also tells you the exact things you need to run to get it to build; you can just copy and paste the build instructions after installing its dependencies. You can probably get it done within ten minutes.
Optically tracked WMR controllers do not work yet in Monado. Some people have code to do the optical part of the tracking, but there is a bit of reverse engineering left to synchronize the IMUs and control the LED brightness to enable sensor fusion.
Optically-tracked WMR controllers work, depending on how new of a build your distribution has and the type, but WMR controllers are generally considered to be pretty bad to begin with. You can use a different style of controller with a WMR headset if desired.
That said, building Monado isn't hard if your distribution doesn't currently have a version that supports WMR controllers. The repo lists all of the dependencies you need, and what they're called for popular distros. It also tells you the exact things you need to run to get it to build; you can just copy and paste the build instructions after installing its dependencies. You can probably get it done within ten minutes.