This apartment is just as lovely in person as in pictures, a great base to experience Madrid from. Really vibrant neighborhood (especially good for vegan and vegetarian food options nearby). It is true that the location does cause a fair amount of noise and can affect your sleep but it's worth it for the location and although it is on the ground floor it still felt very safe.
We did experience some small issues that hopefully were one offs and shouldn't affect future stays. The apartment is run by an external company who overall were wonderful in terms of communication- easily in contact with over a whatsapp group, quick to reply and very helpful (they were kind enough to help us book our taxi to the airport for our return flight). Unfortunately on arrival the person who was supposed to meet us was not there and their phone was off- so we couldn't get hold of them whatsoever. Thankfully someone else from the whatsapp group came and let us in but we were waiting for around 40 minutes.
Inside the flat itself one of the dining chairs must have previously been broken and but left in place because when I sat on it it immediately collapsed beneath me and I fell to the floor.
I could quite easily have been hurt, especially next to the marble table, and it could have been avoided very easily had the chair been removed before we got there.
Overall though this apartment was a joy to stay in and I was sad to leave it.