My stay was even better than I expected! The accomodation is super nice, confy and clean. There is more than enough space in the room for one person and the rest of the apartment is extremely clean and comfortable. Mona is a great, very relax, host. Communication is super easy. The apartmen is located perfectly for enjoying the night life and also having tours during the day. It's just 10 minutes walking from Checkpoint Charlie and 25 of the Brandenburg door.
I would definetly choose it again if coming back to Berlin