Mari & Petz are fantastic hosts, professional and highly attentive. Yok Casa C was exactly as described, a beautifully renovated 4bd/4ba apartment in the heart of Barcelona. The unit is located on the third floor of the building. There is a lift, but we found it easiest to walk up and down the stairs. The office/rooftop is located at the top of the building, eighth floor. Aside from check-in and a breakfast on the roof, we didn't otherwise utilize the rooftop access. All in all, we had a delightful stay at Yok Casa C, much thanks to Mari & Petz and their generous hospitality.