First of all let's start with the great and good things. Sandra is a super host: always available, quick answer and nice. Location is very good if you will feel like a local: near Ferrocarriles de la Generalitat (local tube), buses and near to a few supermarkets and local shops (butchers and coffee spots). The apartment is what you see in the pictures: mattress are really comfortable (little but good), flat has all basics and probably something else (kitchen supplies: oil, salt, pepper, tissue, wash machine soap, cleaning soap; and wc paper, smart tv available, fast wifi, etc.). Check-in and check-out is smooth and easy.
On the other side, if you are looking for a long term apartment maybe you will appreciate to have more natural light (its a first floor). Also things to improve are the living room lighting.