Kinga and her husband were great! They welcomed us like old friends. We would have loved to stay longer and get to know them better. Kinga had really detailed welcome information, explaining keys, wifi, etc, which was great.
Their apartment is open and clean. It's in a fabulous location, close to the tram, many restaurants and a grocery store. Even being close to everything, the apartment building is quiet. The room itself was great too. Interesting decor, some cool books, a comfy bed, and a big window.
I couldn't imagine somewhere better to stay in Berlin.