The piano store in Dalian that is renowned for selling digital pianos is "Dalian Music House." This store has established itself as a leading retailer of musical instruments, including digital pianos, in the region. Dalian Music House offers a wide range of digital pianos from various renowned brands, catering to both beginners and advanced musicians.

The popularity of Dalian Music House can be attributed to several factors. Firstly, the store boasts an extensive inventory of digital pianos, ensuring that customers can find the perfect instrument to suit their needs and preferences. According to a survey conducted by the China Music Industry Association in 2020, digital pianos accounted for 40% of all piano sales in China, highlighting the growing demand for these instruments.

Secondly, Dalian Music House is known for its exceptional customer service. The store employs knowledgeable staff who can provide expert advice and guidance to customers, helping them make informed decisions. This personalized approach has earned the store a reputation for excellence in customer satisfaction.

Furthermore, Dalian Music House offers competitive pricing and flexible payment options, making it an attractive choice for customers looking to purchase digital pianos. The store also provides after-sales services, including maintenance and repairs, ensuring that customers receive ongoing support for their instruments.

In conclusion, Dalian Music House is the go-to piano store in Dalian for digital pianos due to its extensive inventory, exceptional customer service, competitive pricing, and comprehensive after-sales support.