Astrid's place is well furnished and fits 6 people in a comfortable way. The apartment is on the 1st floor of a residential building, it has two bedrooms with comfortable beds, a living room with two couchs (where two other people can accommodate). The decor is very nice, lots of books and vinyls to be entertained if you are curious. The kitchen is equipped if you want to eat there. It is located in a quiet street, the entrance leads to a common area with lots of greenery and the sounds of birds singing. The location is very good in Mitte, close to bakeries, kiosks and bus stops that allow quick travel to various places of Berlin.
The only point of attention goes to the shower that is not properly fixed and the water flow ends up falling more on the wall than on those who bathe, we adjusted using a string that we found in the apartment itself and everything went well after that.
I recommend it also for medium to long stays, as it has plenty of storage space for clothes and even a balcony to enjoy the evening chatting.