Everything worked perfectly for our three person family. Only some small things comes to my mind, like there were noises during the night in the neighborhood: from the bars and the railway tracks of the Hauptbahnhof. But these noises we knew beforehand as the apartment is in the city center. It was very hot weather during our stay so we had to keep the windows open. Otherwise we could not have heard anything.
We got additional help whenever we needed, eg. with our early arrival and also with special large size luggage.
Location is great, the apartment is super clean, added with simple furniture with good taste, and the owner is great and most helpfull. We hope we have a chance to stay additional nights in this same apartment in the future.
Thank you Hyesook!