The pet care center should be clean, well maintained and very user friendly. Some offer pet pick up and drop off or even drop at the door services for pets that are already registered and members of the service.
Ask for a tour of the facility and make sure you get a chance to look at the kennels, vet facilities, spa, therapy areas, exercise areas as well as the general facilities lay out. If it houses several types of pets, are they kept separate and how is each area secured?