Are adjustable shredded-foam pillows worth it?

For many sleepers, yes. Adjustable pillows like the Coop Original and DreamyBlue Signature let you add or remove fill to dial in height, which verified-purchase reviewers credit for solving support problems across multiple sleep positions. The trade-off some community members flag is ongoing 'maintenance'—you may need to re-fluff or re-balance the fill over time.