The flat is in walking distance to the old city and excellent location in general. The cleaning was excellent.
Bedroom: The mattress is sinking in the middle- which does not feel comfortable.
The heating: There is a small electric heater in the living room that needs some time to heat the place- which I found after a long day of walking in the cold I wanted some cosy warm place to relax in the couch but it took some time to heat. Even after 2 hours, it was not pleasantly warm.
Similarly, in the morning you have to wait for the electric heater to heat up the living room-kitchen. It is extremely loud and it goes off every 90 minutes, you have to restart it. Similarly, the heater in the bedroom- you have to restart it every time it goes off.
The couch is not large enough to hold 2 people laying down together (only sitting).
There has been a smell in the building which kind of carries over to the flat.
The flat is not sound proof against the traffic noise and people talking loudly on the weekend nights.
For all the above reasons, I would not stay here again.