Jairo's place is an excellent option for someone traveling alone. The location near Lavapies and Embajadores metro stations is great. The neighborhood is beautiful, with many options nearby for drinks and dinner at bars or restaurants with different and unique styles. There are a few places serving Ethiopian food that should be visited. You will have a Carrefour and a Mercadona 5 minutes away that are excellent places to buy groceries. Atocha train station is also very close, within a 15 minutes walk from the apartment.
Now about the place: the room is not too big but it works perfectly for one person or even a couple. It is absolutely clean and neat, with two chairs and a small table to work or eat. The private bathroom is spacious, clean and modern. One of the most important things ever: the water pressure and temperature was great, like in a hotel. There is an AC that works great. But surprisingly enough, I didn't need it even though I was there in the middle of the summer! The room is well ventilated and it was enough to open the windows to enjoy a fairly fresh breeze. The kitchen is small but comfortable and fully equipped.
Jairo is a great host, he was always available to solve any possible requirement. If you are very concerned about your privacy, then Jairo is the host for you: he is very polite but also very respectful of your space. On the other hand, if you need social interaction with your host, then Jairo is again the perfect host: he is kind and very open for conversation.
To sum up, it was a great experience at a very nice place to get to know the city.