Jan's apartment was an ideal place to explore Berlin, within easy walking distance of most places we wanted to see as well as being on the U-bahn. The surrounding area has some great hidden gems (jazz pub, quirky record shops, marketplace etc) and he provided a very useful and well put together booket of local cafes and shops to visit, with a handy map. The apartment was clean and simple (which suited us perfectly) and communication was quick and helpful.