I just stayed at Martin's apartment for 7 nights. For someone like me who is not known for lack of standards, Martin's apartment sparkled. It is in a well-appointed building in a young and vibrant neighborhood of Penzler Berg, steps away from U-bahn and S bahn station. I was really impressed upon stepping into the apartment, by the three-meter height ceiling and artsy decor with attention to detail. The apartment is sparklingly clean, with comfy bed and lived-in supply for decent daily living. Martin has been a great host even though I didn't meet him in person because of his traveling. He made fool-proof arrangement for us to get the keys. I also loved the choices of cafe and restaurants in the neighborhood. We had a wonderful stay and would come back again!