Small, but really comfy apartment. It's surprising how well one can use such a small space - there it absolutely everything you can possibly need for a short stay in Berlin. U-bahn is just around the corner, so it's easy to access basically all parts of the city. Katharina is a wonderful host - very helpful and patient (we were late to collect the keys for more than two hours..). She replied immediately to each message. I really recommend - it was nothing but pleasure :)