The apartment is as advertised. In fact, it is the cleanest place we have stayed in.
The rooms and living area are all air-conditioned. The street is in a quiet neighbourhood but not too far away if you want to walk to LaRambla. Also, it's near to Raval which has a big majority Muslim immigrants so halal food is easily available.
Oswaldo was helpful and prompt in his reply to our messages. In all, we had a great stay at his place!