Hernan's place was wonderful to stay. It is a real home that he rents while travelling, so all the little care of a home is there (well decorated, all amenities, full kitchen, etc). It is really pretty and comfortable and I would definitely stay here again.
The neighbourhood is quiet and residential, with easy access to both Friedrichshain and Kreuzberg, which are very cool neighbourhoods full of bars etc. While Mitte is father, the flat is very well connected to convenient public transportation, so it's a perfect place to stay .
thanks again!