We stayed here for a week and enjoyed it. The neighborhood is quiet and there are plenty of supermarkets and restaurants close by. Gracia is located pretty far from the old city center, but easily reached by metro. It is about a 10-minute walk to the metro station. A big plus of the location is that it is close (10-15 minutes walking) to parc Guell, which is a lovely park to relax.
The apartment is just as the pictures and meets your everyday needs. The kitchen is small but fine and the bathroom has everything you need. The only flaw in our stay was the bed. Unfortunately, we could not sleep that well, since the mattress was too hard.
All in all, we enjoyed our stay!