Frank’s place is a great place to stay it is super close to bus stop, supermarket, cafe and Charlottenburg palace. There are two bathrooms so even though there are seven rooms, it wasn’t a problem. Kitchen is nice to cook small food.
One thing to address is that the outside wall is very thin, so you can hear mostly everything that is happening outside of the street. But it is surprisingly quite inside, you can barely hear any noise from other guests.
Frank is super nice host, his response is fast and helpful. Recommend.