Lucia was prompt, friendly, knowledgeable and exceptionally welcoming - I can't recommend her enough!
The apartment was exactly as the images on this site show; modern, a perfect use of the space available, fully equipped, well maintained and, above everything else, impeccably clean. We already plan to return there next year. :-) Wunderbar!
We really liked the area; there was no shortage of bars and restaurants within easy walking distance and there's a supermarket opposite the U-bahn station which is a few minutes walk from the front door.
If you're considering a trip to Berlin, you won't find anything better than this for the price.