To me, accoustic isolation is the best asset of these apartments—there were construction activities literally at the back of the building, and nothing at all could be heard! To say nothing of the great location, the facilities that are provided, and the good communication for check-in and check-out processes. I have even recommended these apartments to a friend of mine that will visit Berlin soon.
Yet, once again, the issue with pillows need to be raised. I specifically asked for a new one, for those that were at the room were causing me head and neck aches. Management actually provides me with a new pillow—of exactly the same poor quality than the other ones. Pillows are not so expensive, I guess.