Schleich, a company that produces toys and models, uses Neo4j as the basis for its product data management system. The company collects all data produced during manufacturing in factories around the world and answers questions about products using a framework called Structr to build the user interface. Schleich chose Neo4j due to its flexibility and ability to provide a platform that was previously impossible with their previous software. The transition to Neo4j was successful, allowing for stable and fast data management across departments. Andreas, Dr. Weber from Schleich, recommends starting from scratch and remodeling the data entirely when switching to Neo4j, as this provides the best results. He also highlights the importance of considering customer-specific data models and language in the transition process.