In my experience, fully flocked duck decoys are not worth it. I mostly hunt ducks over water and my decoys get covered in marsh muck on almost every outing. They get rained on and covered in snow and ice. They get bounced around the bottom of boats and in decoy bags. All of these conditions work to ruin flocking. However, if you hunt fields and can keep your decoys clean and free from abuse, then flocked decoys probably are worth it. Flocking eliminates glare, which is a killer on sunny days in the field.