Chris is a great host, excellent communication and helpful throughout the check in process. His aunt who checked me in and showed me the apartment was friendly. Chris's Apartment was wonderful, the apartment is exactly how it is described and looks in the photos. The location of the apartment is perfect, right in the heart of the Chueca area, lots of great restaurants and shopping in the area plus essentials such as food stores and pharmacies are only 1-2 minutes away. The apartment is situated on a quiet street so there isn't any loud noises or music from the bars nearby which allows for a great night's sleep. It is also only around 5 minute walk to the Gran Via and under 20 minute walk to most of the main tourist attractions. The Chueca metro stop is also only a 2 minute walk should you need to use it.
I'd highly recommend staying in Chris's apartment for your trip to Madrid.