Great stay! very convenient location, spacious, very comfortable apartment. A lot of light during the day, has a large kitchen with all amenities. Bathrooms are big and comfortable which is a plus in EUROPE, and there is washer AND DRYER which was super convenient.
Metro is steps away so its very easy to move around. It is on a big street so you will hear some traffic noises but overall the neighboor is quiet. There are tons of "hole in the wall" cute little restaurants to eat around Gracia, located very close to the apartment, so you dont have to go to the busy turist traps to have a good meal.
You have to be careful that if you use a digital key, you dont run out of battery on your phone, otherwise you will be locked out! They do offer option of physical key but you have to go pick it up in their offices.
Definitely would rebook this stay in the future because of location, comfortable space and amenities.