Even though this is BWF approved, the feathers broke in the middle of 2nd set of doubles game.
Maybe they are more suitable for singles game.
I have only tried 2 shuttles so far and results are the same. Don't see any chance of improvements on remaining pieces.

the shuttlecocks feathers break very fast

This product is little costly but on the long run its value for money as the quality is excellent and long lasting

Good product. But a tad expensive though.