Spent 3 nights here on a first-time visit to Madrid. Key takeaways:
1 - if you're lucky, you'll be met by David. He's an incredibly helpful host who gave us a very detailed introduction to the apartment and the neighborhood.
2 - the apartment is very small and doesn't get natural light. We were ok with that for a short visit.
3 - The loft bed doesn't provide much privacy from the rest of the apartment.
4 - The apartment is decorated well - the photos don't quite do it justice.
5 - Air conditioning is limited to the downstairs bedroom. That bedroom provides a much nicer situation than the upstairs loft bed.
6 - The downstairs bathroom smelled of mold. Both bathrooms had very limited hot water, so be sure to grab the first shower.