Alex's place is in a great location, with many lovely cafes, garden squares, a few boutique shops and bars in the area, but still seems quiet and residential. However it is only a 25 min walk or 10 min tram ride from alexanderplatz. I found it to be very charming.
The room itself is spacious and comfy with interesting decor. Small bathroom, no living room and no access to kitchen for tea or coffee making etc.
Alex is a nice and helpful guy, but can come across as a bit uptight as he is particular about his house rules, of which there are many, especially to do with the bathroom.
I did not sleep well at all. I dont know if this is due to the construction work that was on going on the building, of which i was told by alex in advance, or due to the sound of the buildings front door buzzer, which was very loudly heard from 6am onwards at regular intervals, especially as the bed is near the window.