The flat is nice and spacious, located in a quiet street. There is a lift which is useful if you carry heavy luggage. A supermarket at 30 seconds from the flat and some tapas places, very convenient.
The issue is indeed the walls which are so thin that you keep hearing others airbnb guests, especially while they are on the terrace. ( I got lucky that they stopped talking at decent time over the night)
The bed had an issue (bed springs very noisy) but I am sure that Mónica will get this fixed soon :)