Quest Diagnostics offers COVID-19 antibody testing by appointment, with face coverings required at all locations. The company provides a range of services, including routine lab tests, pediatric specialty, glucose tolerance tests, and wellness programs. Customers have reported positive experiences at Quest Diagnostics locations, with friendly and professional staff, efficient service, and a smooth overall process. The receptionists are described as pleasant, knowledgeable, and keeping the facilities running smoothly. The phlebotomists are also praised for their kindness, patience, and professionalism, even when dealing with difficult blood draws. Overall, Quest Diagnostics is presented as a reliable and customer-oriented medical facility.