I would say Raul's apartment is genuinely awesome and I had a great time there. The experience helped me get to know the city well and leave a very great memory and impression of Madrid.
I would like to explain in two aspects: the apartment itself and Raul as a host.
For the apartment, the location is perfectly convenient as it just takes 5 minutes to walk to the closest metro (La Latina). There are numerous brilliant food places surrounding the apartment. There's one little restaurant named Casa Lucas which is my favourite (Raul suggested to us). And the apartment is cozy, tidy with a relaxing vibe. I felt like home during the stay. The apartment is well supplied with everything we need such as information leaflets, map of the city, hairdryer, cooking utensils etc.
And for Raul as a host, we would like to give 10 stars out of five. TEN STARS! He's such a nice gentleman. We arrived late at the first night and he waited for us at the street and helped us with our luggage. Raul spent great effort in communicating with us, sharing with us safety tips as well as recommendations of dining places. He even printed out the names and the maps of the dining places so that we can find them easily.
All in all, this whole experience left us such a great memory of the city! We'd love to go back!