The location was great and the check-in and communication was really good. We had all that we needed inside the apartment, so that tipped the scales higher for our rating.
The problem that we had, in both nights that we spent there, was noise loud enough to wake us up and keep us awake. There were people coming back from clubs, I guess, at 4-5 am, and it's not them who were too loud, but doors slamming.
Also, even worse than that, was some intermittent and very regular noise, as if it was either a song with strong bass, or some device that would generate them. That noise was what woke us up more than any other noises. It lasted for many, many hours each night (I think 6 or 7 hours).
Still decided to give 4 stars, because everything else was quite pleasant, and although we were tired due to lack of good sleep, we still got to enjoy the city.