This is a great apartment! We stayed here with our 2 year old daughter for 11 days and it was amazing. Close to the park (right across the street), but also to metro and bus stops and even really close to a bicycle renting shop (we are Dutch after all) that has also child seats for bikes. In the apartment a child seat and a travel cot were available, so your don't have to take them.
The apartment had great views of trees and isn't too hot. There are also blinds to keep the sun out and air-conditioning. This is not available in the second bedroom, but with closed blinds, not really necessary either. There is indeed a busy road on the bedroom sides, but again, with the blinds closed you hardly hear anything. I do think the walls or doors in the building are quite thin. We thought someone was entering our house, when instead it was the neighbours a few times. But since this is a quiet building, that wasn't really a problem for us. We were more worried about the neighbours and if they were bothered with the crying / screaming of our daughter.
We had most contact with olga while we were there and she has been amazing. She responds really quickly and tries to help whenever she can. On the day of checkout for example, we just closed the door behind us when we realised or daughter wasn't holding on to her doll anymore. I contacted olga and she contacted the cleaning lady that was coming over, to let me in again and get the doll for my daughter. Thanks again for that!!