Unfortunately, this apartment was something of a disappointment. It says "luxury" in the listing, but really it isn't. What looks bright and chick in the pictures has an air of unfurnished neglect in real life (loose cables, tape on the floor and walls, loose threshold), and I would not describe it as "cosy", as some reviewers have. Moreover, it wasn't properly cleaned out, and several of the lamps had bulbs missing.
It isn't stated anywhere in the listing which floor the apartment is on. Do note that, despite the light and aery appearance in the pictures, it is in fact below street level.
The bathroom deserves special mention. It is exceedingly damp, and smells moldy. More importantly, the shower does not work. The owner described it as "fiddly, but fully functional". I would say it is neither. It can't really be described as fiddly, since it quite invariably changes from cold to scalding in 30 seconds, whatever the setting. Running the water in the sink on its hottest setting gives you an extra five seconds before burning. This clearly does not function. My wife had to wash her hair in the sink, and was not amused. What's more, the shower drain does not work, and water quickly spills onto the floor.
We asked the owner to sort out the shower situation and replace missing light bulbs, but nothing happened. He merely asked us to use drain unblocker for the shower, and review his instructions on the temperature settings (which only tells you which way to turn the knob for hot and cold). I see that he's given the same advice to several previous guests. Clearly, he isn't intent on actually fixing these issues.
Alas, I cannot recommend staying here. Although, if more effort was put into keeping the place up to standards, it would be a nice apartment.