We stayed for a week and overall enjoyed our stay.
The location is very central. Which is perfect for exploring the central parts of town, yet it might make it trickier to park the car for longer periods of time.
The rooms are great and the flat is very luminous.
It is an older building and the 4 floors get a bit sporty to climb up and down (especially when carrying luggage or groceries).
The place has its charm and it is clean overall. Some parts could use some renovation (bathroom and kitchen), but they are still fully functional.
Overall recommended if you're looking for a two-bedroom right in the center.