I was in her place March 2016 with my wife and parents. Oliva is a very friendly and welcoming person. She kept contacts with us during our entire stay.
Finding the apartment was super easy, it is very closer to the Central Station. Olivia could not be there to handover the keys to the apartment, but she left the keys in a cafe which is just few steps from the apartment. We fetched the keys from there with no issue at all.
The apartment is very clean and beautiful. Four people can easily fit in there. Kitchen was pretty much well equipped. There is a Lidl a 5 mins walk from the apartment where we could buy the groceries we wanted. We walked to the Tivoli garden and then to the town hall from the apartment. There is a nearby bus stop that we got to go to the Rosenborg castle and Nyhavn. So everything is easily reachable from Olivia's place.
I would recommend anyone this place.