Stefan's place is very nice. There is an elevator if you need it. I had some work to do and I found it a nice place to get things done and if was very close to the Gleisdrieck U-Bahn (which has trains the go both north/south and east/west so it was very handy. Also, there was a brew pub in near the U-Bahn and we ended up there a couple of times...very nice and even kid friendly...oddly enough.