I stayed for 4 nights and we were 4 to sleep there. The appartement is really nice and we didn't have this usual surprise that the space is smaller than on pictures, it's faithful even bigger!
Furnitures are really nice, nothing is missing and it's as clean as in a magazine.
The location was also perfect, touching the M10 to go to the center but also not far from the ring, practical to come and go to Schoenefeld Airport.
Finally Sabine is a serious and organized person who will make you feel in security with her instructions.
I definitely recommend it if you want a calm and nice place to stay in Berlin.
The only bad point if we really want to find one is the humidity high level but if you don't stop the machine, it won't be at all!