The flat fully corresponds to the description and pictures. Warming can be controlled manually in each room. There is a lot of space and rooms with windows get plenty of light during the day. Note that there is quite a small lift (2 persons) and also some stairs before it - might not be perfect for those with a lot of luggage.
Thomas responds very quickly via airbnb app - and that is really great - helped to rule out the irritating fire alarm on short notice.
The check-in/check-out process might involve getting and returning the keys to another apartment in the building on the same street, but that is not too far, so should go fine. Overall, we loved our stay very much, I recommend it.