Opera is a very special little apartment and my wife and I enjoyed our stay there very much. The location was excellent for walking to absolutely every place we wanted to go, including neighborhoods that bordered the city center. And while it is small, the architecture, layout and quality furnishings make it a visually interesting space that is also warm and inviting. The quietness and great light along with the big, useful closet and great shower are major pluses for travelers. The sofa was bigger than expected and quite comfortable, which was nice. A good supply of maps, travel books and other materials about Madrid was a thoughtful touch, as was a good amount of cooking essentials. Unfortunately, during out stay the sliding barn door to the bathroom was nearly impossible to operate. It was so difficult and so noisy that we decided not to use it. This eliminated bathroom privacy and left the toilet in full view from the living room. Hopefully it gets fixed before our next visit to Opera : ) ...Oh, and don't miss the amazing, inexpensive Asian restaurant next door!