The cons first. If you’re looking for a nice quiet area of Madrid, Chamberi is the best. However, maybe not on this apartment. I stayed here for 3 months recently. Unfortunately this apartment had a high class dance club underneath it that play loud music and bass all night until 3-4am on Thursday, Friday, and Saturdays. Easy to hear since you’re not far up. For me, sleep was impossible and people in Madrid don’t start parting until midnight. Kitchen was extremely small but equipped with everything you need. AC and Heater worked great as well as WiFi.
Overall though, the property was in a great area, but thousands of dollars overpriced. As for the property management company, they were rarely of any help, called back only when they felt like it, and one of the most important properties of mine was stolen or thrown away by their cleaning crew on my last day. I even texted them 20 minutes before they arrived to clean to not touch the blankets. All my issues were handled through Airbnb.