Pit House is MOZA's control hub, and it does a lot: button mapping, RGB and rev-light configuration, screen layouts on the wheels that have a display, and firmware updates for every rim and base. It is Windows only, which rules out Mac and Linux drivers entirely.
The software used to be the weak point of the brand and it is no longer the reason to avoid MOZA. Recent versions are stable and the per-wheel profiles work the way you expect. It is still busier than Fanatec's tooling and the touchscreen layout editor on the FSR2 and Vision GS has a learning curve, so budget an evening for first setup if you buy one of the screen wheels.