Really lovely apartment. In a wonderful location and close to two train stations, from which the whole of Berlin was accessible. Very good value for money, and everything we needed was provided. When we arrived, it was made so easy by the flexible check-in allowing us to enter via a key-safe by the front door. Basics such as coffee, oil etc. were provided so we didn't have to go to the shop before we got there as it was very late. Also really appreciated some of the small touches like separate duvets on the double bed.
We did have an issue with not being able to exit the apartment, as one of the doors was locked when we tried to leave to catch our plane in the morning. This was because we hadn't been provided with the right key for this door (which had always been open up until this point). There was also a few ants around the headboard and cupboards of the double bed.
Apart from this, great stay. Would recommend!