Steffens house provided a great base for our stay in Berlin. It is a little further out from the centre but easily accessible via public transport. We used the train to Pankow or Pankow H and enjoyed the walk through a park and residential area that took about 25 mins. You can get closer via a tram or bus but we were happy to walk.
The garden area was our only disappointment and the inter Eric of the house was clean spacious and had everything we needed.