We spent a few days over New Years in the apartment, which really looks like it does in the pictures. On the plus side: the location is perfect (authentic, central and close to everything but still quiet) and the view from the rooftop is absolutely stunning. Also the apartment is indeed very clean and the management is excellent. They always responded very quickly, sticked to agreements and were very reliable, committed and helpful in general.
On the downside the apartment wasn't pre-heated and therefore very cold when we arrived. It is poorly insulated with simple one glass windows and in the sleeping room with the shower there is nothing but the roof tiles protecting you from the outside. Although we had the air condition heating permanently the temperature never made it above 18 degrees there, so it was always uncomfortable to shower (especially as the water in the shower is running rather sparse and doesn’t get too hot). We asked for an additional electric heater, but apparently the management wasn’t able to get in touch with the owner and thus couldn’t help us in this regard. The rest of the apartment was at least a little better and after two days of constant heating made it above 20 degrees (apart from the two toilets which permanently stayed at a frosty 15). Also, the air conditions (regardless of whether operated individually or all at once) caused the electricity to go down completely for three times in five days, meaning we had to go down to the main entrance to reactivate the main fuse (twice during the night) and also restart the small boiler on the terrace. So I’d probably advice against staying in the apartment in the winter or midsummer. The fancy modern design in general negatively affects the livability (for instance you constantly have to walk with a stoop in the second bedroom because of the low ceiling and beams) and there are still some basic items missing in the kitchen.