It was all around a good experience. The whole place is kind of hostel-like with shared bathrooms and kitchen. The rooms are really big and clean. The host is very friendly and helpful.
Still, the room we actually got was not the corner room which was shown in the photo (which was a little sad cause that one would have had a view on a canal). Also there is a 4€ city-tax per night per person that is not included in the prize.
Other then that we had a really good experience. We were even allowed to leave our luggage until 8pm (we took a night-train), so we didn‘t have to carry it around the city.