Can't say enough about Heinz's place. Clean, well-maintained, airy, spacious, full of light, well-equipped and more than anything else, it is in the best possible location....just a block away from the Brandenburg gate and two blocks from the Reichstag. The Memorial to Jewish people can be seen from the window. There are really nice restaurants just downstairs as is a 24 hour market...super helpful for any urgent needs or even to rent bicycles!!
The Tiergarten park is just opposite and I just can't say enough good things about this place either. What's more is that this place has a little nook like a sun room - with sofas and big airy windows to let in the cool air during the heat of summer. Perfect in every way.