This is a great apartment in a lively neighborhood. It’s smaller than the pictures make it seem but otherwise looks exactly like the photos. It has everything you need for an extended stay—down to the details like laundry basket, ziplock bags, and dishwasher soap pods. The shower is just fantastic, the apartment is indeed very quiet, the wifi is top notch (I was in video meetings most of the day and never had connection issues) and there are so so many trendy/high quality coffee shops and restaurants in the surrounding Malasaña area.
For check in, I had to reach out via WhatsApp to the person coordinating guests on-site (the host sent me her contact day-of). I wish there had been better communication in advance as I arrived to Madrid without knowing what check in was going to be like. Note that you cannot leave your suitcase there before 3pm, so consider the nearby luggage lockers (€5-10 per day) or find a coffee shop with wifi if you arrive early in the morning.
For me, this Airbnb had 2 dealbreakers 1) the lack of light. I was working remotely from the apartment and it was impossible to wake up early and maintain good mental health while working all day without a single spec of light. The apartment had lots of lamps and strong lightbulbs, but if you turned the lights off in the middle of the day, the apartment was pitch black. 2) the folks who hang out in the square where this Airbnb is located are a mixed crowd. I never felt unsafe and the neighborhood is great, but the rowdiness was sometimes bothersome when entering and leaving.
If you’re just planning on sleeping in this Airbnb, it’s fantastic. If you’re working remotely or spending more time inside, I’d look for another option in the neighborhood.