My girlfriend and I had a great time staying here. It was the perfect location for what we needed - 30 minutes walking at most to get to the heart of the downtown area and ~10 in the opposite direction to get to the beachfront (where you can see the W hotel).
Juan was great even though he couldn't physically be there. He gave us a tour of the apartment over the phone when we arrived and gave us a lot of recommendations as we were first-timers in Barcelona.
One criticism I have to speak on was about the room. Not sure if it was because of the moist air, but the sheets and pillows didn't seem fresh. They smelled quite musty.