Customers report that the product functions well for grinding herbs, spices, and seeds, and is easy to use and clean. However, some users found the product to be an accessory kit rather than a standalone grinder, leading to disappointment. There are also mixed reviews regarding the ease of use, with some experiencing issues with lids not fitting properly or falling off, and concerns about the design of the lids and the placement of the grinding cups. Performance is generally praised, though some users experienced wear and tear on components after a few months.