ORIGINAL: Diesel77
I got them last January and love them. I would expect they have lots of uses, seeing your broken off arrow when looking for your animal during revovery after dark, seeing the arrow in the ground after a shot for blood/hit inspection, maybe even seeing that glowy tip on a downed animal after dark during recovery trail. Bust most of all I think its seeing the arrow flight after a shot.
Plus.........I think they are a useful tuning guide. I like my arrows to fly as flat as can be. These noks really show arrow flight well.