The apartment is part of a Hotel, so there is 24hrs friendly reception, room service, etc. - unlike a regular Airbnb appt.
We were 2 friends, and rented a two bedroom/bathroom apartment with a fully equipped kitchen. It looks great, very comfortable and clean. Across the road there is a grocery store.
U3 and U9 have stations near the hotel, so it's easy to get anywhere.
It was my first time in Berlin, and I liked mainly East Berlin so FOR ME the location was not perfect.
And, the most important thing - there is an air conditioner. Life saver in such hot weather.