My girlfriend and I had a great stay in Madrid here. It's got a good location, but there are a lot of apartments in the area. The real difference is that the apartment is so new and well detailed!
You have everything you need, Wifi is fast, bed and pillows are comfortable. Bathroom has two sinks and a great shower with good water pressure. Air conditioning works great! Coffee machine is great and dishwasher is good. We were able to use the clothes washer and dryer (almost all Airbnb's here don't have access to a dryer!)
Lastly, Maria helped us check in and she was super friendly and helpful and guided us through a map of Madrid! Thanks so much!!