We do club racing with the KVH flux-gate
compass. Typically we have light shifty winds which quickly separate those who are in phase from those who are not. The tacking course reference feature is thus very handy to measure <how much> you are being lifted or headed. It enables you to set limits on the L or H according to pre-race observations and more easily ''stay in phase'' with the wind shifts. Tacking downwind is similarly enhanced by setting the Course reference to dead downwind and jibing on predetermined lifts.
Another feature we like is the auto-compensation of the
compass by merely doing a slow 360 degree turn. It''s comforting in the fog to know that your
compass is reasonably accurate.
We don''t use the starting timer, prefering instead a regular count-down, count-up stop watch. But what would really help is for the Course reference to show off-course readings to 60 degrees either side instead of being limited to only 20 degrees. This would save the mental arithmetic of determining mean wind directions. But I guess enough is enough. Gotta leave some room for sailor intuition.
Regards, George