We stayed at Jen's apartment for seven days, and we enjoyed it tremendously. The location is perfect - you can walk to the Ring (Karlsplatz) in 15 minutes or, if your prefer, take the subway (only a block away from the apartment), it's within walking distance to the Naschmarkt, and has good bakeries and restaurants in the neighborhood. The apartment itself is very clean and comfortable and has plenty of space for two people. We really felt at home there. Jen always responded very quickly to questions and accommodated our special requests. It couldn't have been better.