Costco Optical receives highly positive reviews for its excellent selection, amazing prices, and wonderful customer service. Staff are consistently described as super helpful, friendly, polite, and pleasant. They provide expert assistance in selecting frames and give honest opinions. The service is noted as quick and expert, with staff going out of their way to help, including thorough inspections and personal updates. Prices are very good, competitive, and allow for additional purchases like sunglasses. The overall experience is frequently called great, with exceptional care from the optical physician. Customers advise that visiting on weekends, Mondays, or after 3pm is best avoided.