This apartment was an excellent place to stay for an extended period of time (for me, 1 month). It is in a very quiet neighborhood, only a short walk from the Friedrichstr. train station which is well connected to the rest of the city.
It is well equipped for longer stays with a full kitchen (while it is not in the pictures, there is also a combination mirowave/baking oven). There were lots of kitchen staples like rice, pasta, spices, etc. already in the cabinet.
I would very much recommend it for anyone who is coming to Berlin for several weeks.