This Airbnb is great if you want to be close to the city center. The host is also very good at communicating if there are any questions or issues, and the place itself is big enough for 5 people.
Be aware and this is totally out of control of the host but there are dumpsters near the building (so in the morning or at night there will be noise of trucks collecting garbage).
Overall, if all you need is a place to rest and want to be close to the museums or Puerta del Sol this is your place