It was a wonderful vacation. The place is very comfortable and had everything we need. COmmunication was great. Every our request was handled in a timely manner (we had some problem with the shower and it was immediately fixed). The kitchen has everything required to cook a breakfast. Also, the basic supplies like tea/coffee/salt/pepper/oil are provided, so there is no need to buy them.
The apartment is located in a very comfortable place - 1 minute by feet from the old city center. There's a quite nice live jazz music pub in front.
Drawbacks:
The cleanliness was not perfect. Especially it related to the kitchen and bathroom. I provided the details to Christoffer in a private message, so hopefully, it will be handled. Also from time to time, there was quite strong sewage smell from the bathroom, so we tried to keep the bathroom door closed all the time.
The stairs are quite steep. Be careful.