Firstly Madrid is a beautiful city, we loved it and we will definitely come back!
The communication with Miriam was great, check-in was lovely and welcoming.
From pictures I liked MIriam's place but being there in person I found out it feels a lot better then the first impression. Everything was sparkling clean, we had everything we needed (too bad we didn't cook because her kitchen is fully equipped for both baking and boiling), I liked how the closets containing tableware (in the kitchen) and pillows/blankets (in the bedroom) were hidden in the wall. The place has a modern-elegant feel. I also liked the bookcases were full of books spanning from arts to history and a lot more, if you feel to read you have lots of choices specially gathered for a wide variety of people and interests.
The flat's location is amazing, right in the center, I would say it's has a great price/value report.
Highly recommended!