I just got this video from André Kjellstrup. It shows the importance of an OSD with instruments in hard FPV flight conditions.
From his own words: "lost visual far out over water when a sudden and passing snow shower with wet, heavy snow clogged lens". Fortunately his craft was equiped with ArduPilot Mega and MinimOSD. ;)
Here is an earlier video from André who is always giving us his feedback…