Juan's place is an aesthetic heaven in Central Barcelona. Very easy to get around most places, 3-5min walk to boqueria market and Las ramblas. Two metro stations nearby plus airport bus stop nearby as well. Juan was very welcoming, sat us down when we arrived to go through where we should explore and eat in the city, drew it out on the map he'd printed us, and showed us the amenities available.
The kitchen is absolutely gorgeous and Juan's got tea and coffee available with some tea cakes, granola and hard toast packets for snacks or breakfast if you want to eat before heading out to see the city.
It was a very safe building and fairly quiet in the neighbourhood, only potential downside is the room being right next to the open kitchen so if you are a very light sleeper or sensitive to noise keep it in mind. We didn't have any big issues though. Overall we had a lovely stay