This is a studio apartment in a quiet building in Malasaña. The host was very friendly, and check in was very easy. She lives in the unit right next door (one first enters a small shared foyer that leads to her unit and the airbnb unit), so she is close by if any problems arise--but no problems arose for me. The studio has a comfortable bed with nice cabinets and appliances. There is no tv, but the wifi works well.
The shower is nice. It has no curtain (just glass), so some of the water drips out onto the floor and requires a towel to mop it up (there is also a mat on the floor), but there was a towel available that I was able to use for that purpose.
The blinds are able to be closed, but the smaller set of blinds doesn't quite close all the way, so there is a small gap that would allow someone to see in at night if the lights were on. But I didn't find that to be an issue, because the window looks out onto a low-traffic floor of the apartment building. I never saw anyone in front of my window.
Overall, a solid place. The unit was clean and had everything I needed, the price was right, and the host was friendly and available.