Mimi's place is a great base to explore Berlin. It is bigger than it looks in the pictures, and had all the facilities we needed. Mimi was super flexible with our plans, and really helpful.
The apartment is really handy (especially in terms of getting from and to Schoenefeld Airport), it's a 5 min walk from the train station (train to central Berlin takes like 10 mins), supermarket, 10/15 min walk from the East Side Gallery, Oberbaum Bridge, but it is still located in a quiet residential area.
The apartment has all the facilities you could need.
I really can't rate this place highly enough!