I had a wonderful stay with Ursula. She was a considerate host who checked in frequently, asked me if I needed any recommendations or directions, and was genuinely warm and fun.
The room I stayed in was spacious and well-lit with a balcony window. Be aware that there's plenty of noise on the street at night. Ursula also cares about cleanliness/tidiness, so that's something to keep in mind.
It's conveniently located in the center of the city, which gives you easy walking access to cultural landmarks such as (Royal Palace, Prado), shopping, delicious food (Mercado de San Miguel) and a range of neighborhood sites.