I stayed at Moises flat for a week and can absolutely recommend it.
The room has everything you need, is quiet and gets nice natural light. I worked remotely during my stay, which was no problem due to the small deskarea and stable, fast Internet.
I very much enjoyed the balcony (sunny for the first half of the day) which is on a quiet street without regular traffic. On the weekend you can enjoy watching "El Rastro", the famous fleemarekt, right infront your door.
The kitchen has everything you need to properly cook. Guest get their own fridge ond Moises generously lets you share his spices, oils, tea etc.
The location is fanatsic, you're away from busy, loud roads, but right in the center and can quickly walk to many interesting places and good bars/cafes/restaurants.
What I enoyed most was the very relaxed and welcoming atmosphere. I felt right at home, Moises and Felipe are great and very sympathetic roomates :)