We can fully recommend Elias‘s apartment.
Location is great for city trips - coffee bars, restaurants, shopping literally around the corner, while the flat itself is in a quiet road.
The flat is tiny but highly functional and very tidy, we even managed to stay there for a week with a baby without problems. If travelling with a stroller: there were a few stairs and a small historical escalator, but it worked out as the hallways are large enough to park the stroller.