A communication failure between the host and the person standing in for her meant waiting an hour for check in.
The flat is spacious and looks good, like in the photos. The balcony is part of the flat. The terrace on the roof shown in the photos is communal to the block and freely accessible.
Washing machine, tumble dryer, fridge, kettle, iron, air conditioning worked.
There is a capsule espresso coffee machine. If you want a large cup of coffee there is a filter holder but there was no paper and no cafetière.
Wifi worked well inside the flat; on the balcony the signal was generally weaker, though rarely a problem.
Hot water is limited so keep your showers short before the water runs cool. I don't know how long it would take to warm up again for a second person.
I heard no noise from the other flats in the building. For a side street in a residential area there was a surprising amount of traffic. Aircraft noise is frequent.