Being near the centre of the city comes with some compromises - traffic is incessant and the streets are noisy well into the early hours of the morning; apartments, and consequently, rooms are not very large. Two people may find it difficult manoeuvring. Also, Barcelona is *hot* in the summers -- consider splurging for air conditioning or at least a room with a fan.
That being said, everything was as advertised. Noa welcomed us, gave us keys, access to the wifi, clean towels and a clean bathroom. We had no complaints during our one night stay in her apartment.