We are a family of four with two teenagers, and stayed for 5 nights at Jens' apartment during mid-winter. The apartment was warm, spacious and amply catered for our needs. Really good location and easy check in, the ground floor apartment was a relief after several other previous accommodations that had steep stairs and no lifts!
Jens was very responsive when we had an issue with the cooktop and it was fixed the next day. The apartment was well equipped and clean - one comment is that there is only a shower in the bathroom so younger families may find this a little challenging. For us this was no problem and we would be happy to stay here again.