This place was very good. Carlos was very responsive to our needs, did all he could to provide us with an earlier check in (our flight arrived to Madrid quite early), a neighbor was essentially on call to help with anything, and didn't hesitate to reopen the flat the last night after I had to leave and my wife who was out didn't have keys to get into the flat again. Carlos was very good as well on the first day when I struggled opening the door and he patiently guided me through how to handle that lock. The bed is not ideal for couples (it's a futon that expands but stays at different levels) but it's still quite comfortable. All other amenities were very good. The Wifi worked just fine as well as all the rest. Location was excellent.