Our stay at Ruben's place was awesome from the beginning, they are the perfect hosts and very supportive! The location is just great, plenty of life, cool bars and restaurants around, metro is just 3 minutes walking, convenience store down the street...
The place was super clean, new, plenty of sunlight during the day, nice views to the square, all appliances are new and the bedroom is quiet with a very comfy mattress and fresh sheets and towels, ideal for having a good rest after a day walking Madrid!
On the flip side, if you get there driving you may need to use the parking lot (within walking distance) since it's the very center of the city and is quite restricted to traffic.