Ivos' apartment is great. The location is good, right on a major station for the U and S Bahn and bus routes, so you can very quickly get around the city at any time of day or night.
The apartment building itself is quiet and the view of Berlin is beautiful. The only minor issue is that it's located next to several major roads, and the ambulance/police sirens can get a bit loud (though no different than any other major city)
The apartment is clean and nice, and the shower especially is very good.
There really was only one small con to this place: the bed is really a futon and there was only one small pillow provided, so it was a bit less comfortable than ideal (unless I missed a linen closet with more pillows). But once you got used to it there was no issue, and I would certainly stay here again