We were so pleased with Paula's place! It is in the middle of the most busy part of town but still quiet because the building is in a semi-private corridor (locked to public traffic after 9pm). It's only about a 15 minute walk from Plaza Mayor and the famous food market. Also 15 minutes to popular nightlife districts. Since it's such a central location, there were still a lot of people walking around late at night (some quite shady) but they left us alone for the most part. Same issues in any major city. There's a taco place (Takos Pastor) a block away and it was amazing to have such delicious food and cheap (1 euro tacos) so close-by!
The apartment itself is very clean and spacious for 3 people. We really appreciated being able to use the washer/dryer. The shower pressure was awesome. They even had umbrellas for us in case we needed them! The whole place was very well thought-out. You can control the thermostat but I would definitely bring slippers because the apartment could be very warm but the floor was still freezing cold. Not a problem for us but something to keep in mind when packing! Lastly, definitely pay attention to instructions on how to use the keys/open locks and practice at first to make sure you understand!
Overall, we really enjoyed our time in Madrid and staying at this airbnb was a major part of it! The hosts were so kind and flexible. We would stay here again!