We were 5 girls and had a lovely stay at the apartment. There were enough sleeping spots, but I would not recommend being more than 5 due to having only one bathroom. The apartment was spacious as it was on two floors, and nicely furnished. The location was also absolutely fantastic, with numerous cafes right next to it.
On the downside the fridge had an incredibly foul and repulsive smell that filled the room (to the extent of nearing smell of a dead animal) and we could therefore not use the kitchen as we intended, as we could not refrigerate anything. (Therefore the low score on cleanliness, though other aspects of the place were clean). Also, we only received one large towel each and 3 small ones in total, which is not enough for a 5 day stay. Two large towels would have been preferable. We were denied more towels upon request.
Check in was easy and we were allowed to enter the apartment ahead of time, which was much appreciated. it would have been nice if we had two sets of keys for a larger group. There is a very small lift that fits one person and one suitcase.
All in all enjoyed our stay and would recommend!