Used this place for five days. Very comfortable and useful for our needs, which where mainly at night. Very comfortable beds. May seem to be a little space but enough to have breakfast, sleep and spend the night time. Really quiet even thought we saw a lot of people around from other apartments. You will also find some things to eat already in place, but the area does have many markets.
Absolutely no problems with communication if you need anything.
Well connected with trams, just 20 min from Alexanderplatz.