I stayed at Andreas' flat for a little under a month while traveling to Berlin for a work trip. His flat was the perfect location for my stay for multiple reasons.
First, the location was incredible for a tourist's visit to Berlin. I traveled around the city quite a bit and found Andreas' place to be a central location -- I think his neighborhood is quite literally in the center of the city. There is also a train station steps away from Andreas' front door. This train station made getting around the city so easy and was perfect for me to get to and from work every day.
There was tons of things to do around this flat and tons of great restaurants, shopping and cafes to choose from.
I also found his flat to be very clean and home like. The flat was spotless when I arrived, had all the amenities described in the post, and felt like the perfect home base while I was in Berlin.
I would highly recommend staying at this flat if you want a nice place to stay while in Berlin.