Frank is a gem, as is his lodging. It’s in a fine location—you are literally right next to the subway—situated right between a bustling street (not a big party street, but still lively) and a quainter neighborhood with small, very good restaurants, bars, and cafes. Frank is very knowledgeable about Berlin, and his English is just about perfect. More than that, he’s a good, charming lad. If you don’t mind being a subway hop from the museums and clubs, this is a great, decently affordable spot.