We stayed in Marls's place in June 2019. The apartment itself is as described and is 4th floor with no lift. To check in, you need to go to a shop down the road to collect a welcome pack. The kitchen is not well-equipped and the kettle was full of limescale. With the price you are paying, you cannot expect a central location but it was harder to reach than expected, with transport links taking around 30 minutes to get to central Berlin. Mattress was quite firm but comfy enough, with two separate thin duvets which was all that was needed. As it was summer, we would have found a fan useful. Bathroom was equipped with enough toilet rolls as well as shower gel and shampoo etc. Overall, it was enough for the price that you pay.