The flat was really well situated in the city center, really close to the subway. The beds were comfortable, the kitchen modern, the rooms beautiful and clean. The owners were really helpful as well.
The problems were only 1 bathroom with 1 WC inside for 12 adults, but we already knew that before coming, so it was not disappointing. The real and only problem was that we only had 2 keys for 12 people, which was clearly not enough to be independant from one another.
I would recommand this flat, and if the key problem is fiwed, I would come back here when I come back