This is a very convenient apartment if you are going to a conference nearby (this was my case). Klaus was always very responsive to ask my questions. The neighborhood is not as attractive as other parts of town. Small and easy fixes can greatly
improve next rentals: avoid leaving the keys at a convenience store,
remove organic trash prior to arrival,
fix entrance door and noises in the heater. These all are suggestions that can be easily fixed. Above all, I thank Klaus, he was a great host that was always there to help when I had questions.