This is a nice and clean apartment at a great location, but it it was not the best experience we've had with Airbnb.
First it is probably better suited for a group of 3 people, rather than the 5 we were in, since it is not too big and only has one bathroom. So far, it is not really a problem, and we knew about it before arriving. But the apartment does not have a very good sound isolation (from within and outside the flat), so the guests can feel like they are all in the same room, without much privacy (even in the bathroom).
But what really made us feel less comfortable than ideal was the check-in process using an app. Although we are enthusiasts of self check-in, this was not a good experience. First the hosts contacted us outside the Airbnb platform, which did not seem standard for us after using Airbnb for a long time. Then we had to download a smartphone app through which we had to upload photos of the passports of all the guests and pictures of all the guests prior to arrival. The app did not work very well, and we ended up having to write down all the information of the documents of the guests one more time in the app. We understand the Spanish government asks for that information, but photographing the document in an app that is not Airbnb did not feel very safe, and in other places in the country we have had better experiences with hosts who ask for the information or who check the document themselves upon checking in. After all that, we would also need to have internet connection in the smartphone upon arrival at the Airbnb in order to open the door to the street and the door to the apartment --which can be a problem for international travellers without a phone connection.
We never met the hosts, but they left a lot of information, tips and rules about the apartment in a booklet both in English and Spanish.
In the end, everything worked out, and we really loved the neighborhood, but it was not our ideal experience.