Great apartment and a helpful owner. Quite good location, but the street is note very nice though.
This place is great for families or friends. However, it is not very comfortable for corporate trips in groups. Example: for up to three persons (same or different gender) is OK, but if 4 or more people of the same company decide to stay here, it can be a tricky situation with beds and privacy. Our contact person for check-in/check-out only spoke German.
But once again, really nice apartment for a Berlin gateway.