To be honest, Norbert did try all his best. Clearly instruction to help us get to his place as well as house's rules. We knew in advance that his place is far away from Berlin's center but we wanted reasonable price, so it's fair enough.
Our own room is big enough, clean and had enough items which we might need during our stay.
But we didn't expert that cat/cat's food smell or smoking smell disturbed us THAT MUCH. Even though he had air ventilation running all the time but me and my boyfriend couldn't stay in the common area if it wasn't necessary.
We think that Norbert's place needed badly a good clean/ tidy organise in the common area: kitchen, bathroom, entrance.