Overall the apartment was quite good for its location (near Mercedes Benz Arena, 30 min from city center), basic equipment availability, friendly and helpful host.
There are some points to consider if you consider to rent this apartment:
1 - this apartment may be suitable for 7 guests as there are 2 single beds, 1 sofa, 4 beds on the upper decker; but be aware that the last on the upper decker may not be very comfortable as this was for me with my friends.
2 - the bathroom is quite cold and the floor is old and molded.