Everything in the flat was exactly as described. Window in the bedroom was surprisingly soundproof, so even though the exterior of the building was being renovated, the noise was almost unnoticable. The big window in the front is covered with opaque foil and there are curtains, so there's no problem with visibility from the street. The only issue is that it's hard to ventilate the flat, as openable windows are only on the back. It wasn't much of a problem tho. The heating works very well. There's a nice Turkish shop about 150 meters from the flat and a Lidl supermarket not too far away.
Google Maps will tell you that Karl Marx St. U-Bahn station is 15 minutes away, but actually if you choose to go through Jan-Hus-Weg and Gerlachsheimer Weg (near Böhmisches Dorf), you can get to the station in less than 10 minutes.