We had a great time at Frank's place! The location is PERFECT. You are steps away from public transportation and food options. There are multiple grocery stores within walking distance. Also, the apartment stayed very cool (temperature wise) which I was concerned about given we were there for some very warm weather! The shower is fantastic and the bed is comfy. We would definitely stay here again and had a wonderful time in Berlin! Also, many thanks to Frank for being so cooperative with our last minute later check-in due to a flight delay.