We had a lovely stay.
Although “cozy” = “small”, we were fine in this apartment for 4 days with 2 adults & 2 older teenagers. The bathroom is indeed the size of a linen closet, but again, serviceable.
Note that this place has a stove but no oven. The balcony conveniently has a clothesline so you have an easy place to dry clothes after using the washer.
Location was great - in between Hospital Sant Pau & Sagrada Família, close to lots of restaurants & metro.
The apartment was clean and safe and the hosts were very responsive to all communication.