Mark's place was clean, bright and comfortable. The bed was fantastic and sometimes we decided to sleep in and just enjoy the apartment. Very quiet, windows looking into a lovely internal courtyard, the apartment feels private and safe. The location is great, we really enjoyed Prenzlauer Berg with cafes, restaurants and grocery stores within walking distance. The train station is very close and easy to use, there are also trams but buying a ticket on the tram can be slightly more confusing. Mark was a wonderful host and helped us carry our luggage up the stairs and get us settled into the new apartment. I was also ill at the time and he walked us to the closest clinic (5-10minutes walk, practically around the corner) and was easily contactable for the rest of the trip. Would recommend and would stay again when I next visit Berlin.