We had some problems with the check-in hour (flight cancellation and delays) but Mohammad was really understanding and waited for us. Also gave interesting information about the period (1st of may) and about the neighborhood.
The place was tidy and with everything needed.
The position is fantastic. Neukolln is one of the uprising neighborhood of Berlin, close to the city center and next to Kreuzberg, is full of nice spots.
Highly recommended.