Excellent place to stay in Berlin: very good central location, walking distance to many attractions, metro is less than a minute away, there is a good bakery across from the building.
The place itself is nicely done and very clean. The bed was very good. We were 4, with 2 people sleeping in the bedroom and 2 on the pull out bed sofa.
The kitchen comes with a large expresso machine as well as a Nespresso. There is also a dishwasher and stove top.
Bathroom was spotless and comes with plenty of amenities, including sunscreen.
It was hot when we visited Berlin and this place - as most houses in Europe - does not come with airconditioning. Fans were provided by our host. Because the apartment is at street level, however, it's a bit harder to fully open the windows at night to cool off.