The place is very clean and in a great neighborhood. I felt safe while walking at night. There are local restaurants and bars, however, The metro is close and can take you anywhere in a short amount of time. Martina and Walter are lovely people with a caring and generous nature. They helped me with a map and showed me where some of most popular attractions were. It's was greatly appreciated. The ensuite bathroom is fantastic and very clean like you would expect from a nice hotel. The heat/cooling system in each room is a very nice touch.
The house is shared with other guests and the only "not so great" thing I can say is more of a building design flaw and has nothing to do with the hosts themselves. When someone flushes a toilet or takes a shower there are loud rushes of water in the room I was staying in. It can be hard to sleep if other building tenants and/or guests decide to shower during your slumber so bring earplugs. I never travel without them.
I would definitely recommend staying here. Thank you Martina and Walter!