Gerd and Ulli have a nice apartment very close to the main train station and only about a 10 minute walk from Marienplatz. He was very accommodating once we got there, though coordinating our arrival was a little tricky between their travel schedules and our lack of wifi. They had guides and maps ready for us in the room. Gerd was kind enough to let us use his washer (just 5€). Overall it was a very convenient and comfortable place to stay to visit Munich.