This place is a must-visit for any burger enthusiast. The Wisconsin's Butter Burger is a game-changer, with its smothered-to-perfection butter that takes the flavor to a whole new level. The menu is concise, but the quality is top-notch, and the prices are reasonable considering the generous portions. The restaurant's atmosphere is cozy and casual, with a touch of American nostalgia. While the burger might not be the biggest, it's packed with flavor and will leave you wanting more.One minor issue is that the restaurant can get quite crowded, especially during peak hours, which can make it difficult to get a seat at the bar or a table. However, the staff is friendly and attentive, and they do their best to accommodate the large number of customers.Overall, Milwaukee Burger Joint is a hidden gem in Madrid that serves up some of the best burgers in the city. Whether you're a local or a tourist, it's definitely worth a visit.