Costello Jewelry Company in Naperville offers friendly and professional service with a focus on customer satisfaction. Customers appreciate their quick and quality jewelry cleaning, which leaves necklaces and other jewelry looking like new. The staff, including Maureen and Trisha, are known for being helpful, caring, and knowledgeable. They assist with jewelry valuation in a respectful manner and provide detailed guidance during purchases, such as engagement rings and wedding bands, ensuring everything is perfect for the customer. Many customers feel valued and treated like family, with some receiving follow-up check-ins after their visits. The business also handles jewelry repairs efficiently, like resizing watch bands, often in just minutes. Overall, Costello Jewelry Company is highly recommended for jewelry cleaning, repairs, and purchasing, with many customers returning and becoming loyal lifelong clients thanks to their excellent service and friendly atmosphere.