Pros:
-Best location ever. You actually dont need to even take the metro as you can walk anywhere
-Comfortable bed with private bathroom
-The kitchen has everything you need for meal preps
-Strong Wifi
-Friendly host
Cons:
-There is a night club right below the apartment. Parties go from midnight to 6 am even on a Wed or Sunday.
-The place is not very comfortable for remote workers. There is no desk in the bedroom and you cant really use the living room to work as the owner uses it as a beauty salon or small gatherings with friends.
Have fun in Madrid !