Hey Matthias/Carl,
your flat is great — since it is located very close to the city centre. This was great. Also, the kitchen area and living room look great and are nicely furnished. We enjoyed the small terrace as well. But, your flat wasn't clean. The bathroom was extremely dusty, your plants are dying, the terrace was filled with old boxes and stuff, the floor was dirty and as someone mentioned before, the refrigerator was filled with lots of leftovers. In addition to that - you have very loud neighbours, which like to party until 4 am. Paying so much for cleanliness and service didn't seem appropriate.