We had a wonderful stay at this lovely apartment. It is clean, very modern and comfortable.
The apartment is big enough for 3 people, but I don't think it would be suitable for more.
The location is perfect, we loved Villa de Gràcia, it's a bustling "barrio" with lots of bars and shops, that is near to Passeig de Gràcia, la Pedrera, casa battlo, parc güell and the rest of the city center. It is well connected to the rest of the town: the buses and the subway are just a few streets away.
The only issue we had, is that it can be noisy at times during the night, because there's a lot of people going around the area and in the bars, at least during the holidays.
Anyway we would recommend this place.