I stayed at the apartment for 8 nights, travelling solo for a law program. Elizabeth was really accomodating with meeting me at the apartment when I arrived in Madrid - check-in was highly flexible. She gave me great tips on the neighbourhood and local places to visit.
The apartment had all the amenities you could need which really helped with my week-long stay.
One thing I would advise is that trash is collected daily which is something I didn’t know in Spain, so if you have any garbage make sure you take it out during the evening when the bins are out.
Overall amazing experience, great apartment, would recommend!