Very well situated flat, close to public transports, with a balcony and great city/park views.
Nevertheless, we were suprised to discover that her flatmate had rented her room to a couple while we were staying there. As a result of which, we ended up being 4 people sharing the bathroom, and although the couple was very nice, we would have appreciated to get some previous notice of their arrival.
The bedding is comfortable but quite small for two adults ( 140 cm wide I think). Also Clara's room (btw, we didn't meet her) was full of her belongings, (clothes, pictures...) which doesn't really make the host so welcome since he feels like really stepping in someone's private bedroom...
Overall I would recommend the flat to visitors on the budget in Berlin.