We were two people travelling and the only ones on the tour. Despite others having booked the tour in advance, and then canceled last minute Yusuf decided to move forward with the tour either way.
He is a charismatic and knowledgeable guide, capable of drawing comparisons between East-Gernany/DDR and eg. Poland. The utilization of pictures and maps helped alot with the understanding of Berlins history from the 17th. century till today.
It was nice to experience a guided tour describing Berlins history, without only focusing on the 20th. century.
Thank you very much to Yusuf for a great tour.