Our stay at Pier's was great! First of all the location was very convenient, not even a 10 min walk from Plaza Catalunya metro station and Las Ramblas! A very safe area as well, when walking back after touring the city all day we felt safe. The room was big enough for both of us and had a queen size bed which was very comfy. The bathroom was spotless! Shower time was pleasant and it was nice not having to worry about water pressure. We had access to Wi-Fi and never had a problem with it. The place also features a roof terrace but we didn't use it during our stay.
Pier made sure there was orange juice, coffee and cereal at our disposal for breakfast and he also gave us keys to come and go as we pleased. He had maps available and took time to explain what Barcelona had to offer and tourist highlights (we quite enjoyed the dancing fountain so thanks for the suggestion!). He also shared with us his taste for electronic music and introduced us to his favorite DJ Paul Kalkbrenner, he even showed us a couple videos.
It's important to note the building has an elevator, quite helpful if you're traveling with big suitcases like us! The one problem we faced was heat: the apartment doesn't have AC and there was no fan in the room so the place was quite hot and this made it hard to sleep at night. Our only suggestion would be getting a fan for the room and then everything would be perfect! All in all we recommend Pier's place, you'll have a wonderful stay with a fun host :)