We went through a very big confusion as there were other people in the apartment when we got there in the middle of the night. Not cool.
Oscar was very responsive trying to sort that out. We realized that the other people were in the wrong place (they had rent the apartment next door, which is very similar). It probably wouldn't have happened if the check-in process hadn't involved an unlocked door. It would be a must for Oscar to add a keybox next to the door.
That misadventure behind us, the rest was good. The apartment is very clean and the location is awesome.