This is a fantastic Airbnb. The location is excellent -- close to attractions, central station, restaurants, cafes etc. The flat itself is wonderful and the photos don't really do it justice. Great design, comfortable bed, spacious seating and dining areas.
To get the key you have to go to the 7-eleven across the street, enter a code (sent to you by Anna) into a little machine, and then have the cashier get the key from a box on the wall. This was a new experience for me, but not hard to figure out. To return, you scan the fob on the reader and then give the key back to the cashier. This is doubtless much more complicated than the usual keybox-by-the-door-with-a-code for other Airbnbs I've used but really no problem.