Had such a great stay in Martin's place, it was perfect and just what we were looking for. Martin himself is very friendly and obliging really took his time with us and gave great recommendations. I would definitely stay in Martin's place again when I'm back in Berlin and would happily recommend him to others. The location is great also it's a 2 min walk from the nearest metro and 10 mins into Alexanderplatz. Thanks for a great stay.