Inma was very organized and detailed with her instructions. She also provided great recommendations to restaurants around the area. The apartment is located a few minutes from the metro and a few stops away from all the major sights. You can walk to them, but it may take a little less than half an hour depending on your pace.
The place itself was quite the walk up if you are sedentary like me; but it was clean with amenities as described- minimalistic. Bedding was okay. The AC/heater and water pressure was adequate. If you need anything, there is a supermarket a few blocks away.
Overall, we enjoyed our stay in Barcelona.