Carlo has been a very kind and respectful host. As for the place, it is simple but very comfortable, especially the bed. It is located very centrally. I spent 4 days in Madrid and walked to and from everywhere (except from the airport of course). It is also in a very safe area. I could walk to Carlo's apartment in the middle of the night alone in midweek without a worry. The room is very quite despite being very central, you don't hear any traffic or people outside. The room Carlo rents is right next to his own room and any kind of noise carries I must say (talking, when the door opens etc.) which is normal, and Carlos was being very respectful overall. I would just suggest you take earplugs with your for sleeping if you are a very light sleeper, they help. Overall, the room was great value for the price, I highly recommend it. I had a great experience both in Madrid and at Carlo's place.