Great location in a very quiet courtyard and close to subway station and Postdamer Platz/Sony Center. Keys pickup & dropoff was easy, once we located her house (which is on the right side of the main entrance of the building straight ahead in the courtyard). Heidi was very kind and she also agreed for a late checkout, since our flight was leaving late in the evening.

Apartment needs some improvements: the shower has no door, therefore water tends to flow around the bathroom or even to the main room (a broom to drain water is provided in the bathroom); carpet needs stain removal; the bed is a bit small for two people and the pillows are not comfortable.

Overall I would still recommend this apartment for short stays in Berlin.