We stayed at BlackF for almost two months while looking for a long term apartment in Freiburg. We chose them because of the great and modern looking apartments. The XL apartment had plenty of space for two people to easily get along with each other. Cleaning was once a week but you are able to supplement yourself as needed. The one downside was that the kitchen was a little small so that we only made simple meals and ate out more often. All in all a great place to stay at and I would come here again if I needed a short term furnished apartment.