We had a wonderful stay at Pere I Carme's place. The apartment was perfect for our party of 6. The apartment was clean and well equipped. The two bedrooms facing the courtyard have a small sitting area with lots of natural light, which is perfect for sitting down to read or check emails when you need a break from all the sightseeing/walking. The apartment is also very quiet. We didn't hear the neighbours or any street noise.
Good location, close to two subway stations and many bus stops, and with plenty of supermarkets and restaurants. Casa Mila, Casa Batllo and Sagrada Familia are all within a 15 minute walk. And you can also walk to the other areas like the Born district, Ciutadella Park, etc. Or take the subway/metro.
Would definitely recommend and stay there again!