Carniceria La Constancia is praised for its excellent service and affordable prices. Customers appreciate the friendly cashiers and the prompt service, even during busy times. The establishment offers freshly cooked meat on request, ensuring that no one leaves empty-handed, which is a rare find. However, a new waitress has received negative feedback for her unfriendly attitude, causing some customers to consider switching to another butcher shop. Overall, the business is recommended for its quality food and attentive staff, with a few concerns about recent service changes.