I'm renting my apartment which has 63 qm, a big living room and a big room to sleep. The apartment is very good located in the centre of Berlin Friedrichshain. You just need 3 min to Frankfurter Allee (S + U-Bahn) and 15 min by foot to Simon-Dach-Straße where you can find lot's of bars, restaurants and clubs.
The apartment is in a very quit street so you can sleep very well.
On top you can use a fully equipped american kitchen with lot's of ingredients.