Stayed here for a long weekend in Berlin. Lots of places to eat and drink nearby and close to the U-Bahn. Lovely and spacious and actually even bigger than we expected. Four of us stayed but six could fit in the beds comfortably. There is only one bathroom but this was fine for us.
Easy to find and keypad on the door made it easy to get in and meant we could do our own thing without having to worry about who had the key.
Flat is slightly dark during the day due to it being a basement but we were out seeing Berlin most of the time so this didn’t bother us.