Customers praise the product for its excellent protection against moisture, scents, dust mites, and allergens, keeping pillows clean and in good shape. Many reviewers highlight the material as soft, comfortable, and waterproof, with some noting it does not crinkle. However, opinions on the material are mixed, with some finding it rough or plasticky, and others expressing disappointment with the advertised 100% cotton content due to the presence of polyurethane and polyester. The quality of the product is generally viewed positively, with mentions of durability and good craftsmanship.