Tool Depot San Diego is a highly recommended local hardware store that provides exceptional customer service and a wide range of products. The staff is described as super helpful, very polite, and providing a "local shop" vibe, guiding customers through various solutions and options. The store is praised as a "hidden gem" that offers a rare and hard-to-find service, with the owner being a straightforward and nice guy who charges reasonable prices. Customers highlight the store's ability to provide hard-to-find parts and tools, even when larger hardware stores cannot. Overall, Tool Depot San Diego is portrayed as a reliable and customer-focused business that is valued by the local community.