We booked this apartment for 10 days in december. It's situated perfectly, most of the city's sights and attractions are within a 10-20 min walking radius.
The apartment was pleasantly warm throughout our stay, the floor heating worked very well.
Since we mostly cook ourselves we were missing a few kitchen utensils but the owner procured and delivered them on the very next day after we asked. The communication was quick and responsive.
Summa summarum - a perfect apartment for a short 3-4 day stay, for longer visits it's missing a few comfort options such as couch table, table- and standing lamps.
Overall we would highly recommend this aparment.