First off, the location is great. We were a block from the subway line and it took us 11 minutes from the door to the beer gardens of Marienplatz. It was also a couple stops to get to the river park. The neighborhood has some great places to eat, is safe at night, and was not noisy, even with the windows open.
I do wish there was more than one key. This proved a little problematic when I went to get pastries for my girlfriend in the morning. The key powers the electricity and it she was unable to keep on the fan to cool her off (it was very warm and humid when we visited). The bed was very comfortable (best on our trip to Europe!) and the showerhead made us feel like fair maidens under a waterfall. The apartment was also spotless. Please note that this is not someone's apartment, but rather a hotel-style Airbnb apartment - which is fine if that's what you are looking for.