I really recommend those appartment, so that it was really clean, brand new, smart desing and also very well located.
The location for me was perfect so that I was just in the middle between the airport and city center. The appartament is just beside the s-bahn station, in less than 15' you can be in the East side gallery and in 5' more in Alexanderplatz station.
You can find a supermarket on the corner and many places to have a coffee or just to buy bread just under your window.
For sure a smart decission to take if you ar looking for a place to stay in Berlin.