Great location and the host is very hospitable. She will greet you with an ice cold beverage upon making the 100+ stair, 5 story climb up to her penthouse with your luggage. She also did all our laundry (about 3 days of clothes for 2 people) and left them dry and tidy for us to fold when we got back from a day of exploring .
The rooms are pretty small and there is not much room to breathe, but gets the job done. While there are some modern touches to the space, most of the penthouse is very old. If you are looking for old Barcelona charm, this is it. All the doors are very old and do not have proper locks, however the host will provide a small u-lock with a key if you want to lock your space when you leave for the day. We felt safe and secure and left our door unlocked most the time. With old comes grit, so please note this space is the opposite of a fresh hotel room.
There is a dog that will come to hangout with you and may sleep in your room with you if you dont close the door. Its super sweet and not bothersome. There are also 2 cats, though we barely saw them. While the penthouse does not smell of animals, it's worth noting there are the 3 animals.
The only negative to note is if you go in summer it is very hot in the apartment and has poor airflow. The air-conditioning was nonexistent and was essentially blowing around 30 degree air, which didn't make a difference. We had a hard time feeling refreshed upon coming back to the unit to shower and get ready for our evenings, so we ended up leaving a day early to a hotel across the plaza to cool down and refresh.
Overall it is a unique experience, but you should not come in to this looking for a hotel or boutique environment. Expect to be staying in a 200 year old hostel environment.