Great apartment exactly as it looks in the photos.
The location is amazing and the host Maria José is also very helpful.
Calle de Valverde is not a very quiet street at night, as one might expect given its central location. The apartment is also opposite a street side set of recycling bins. I am a deep sleeper and so this was no problem for me at all. I can imagine however that if you were, then the late night and early morning habit of recycling glass bottles (which seems surprisingly pervasive) and the noise caused as they are dropped into the bottle bank would be quite annoying!
I would definitely book again though, despite the bottle bank situation.