We had a lovely stay at Berus's apartment. The apartment is really cool and has everything you could need. The u-bahn stop is right outside but you do have to swap to get to the main city sites, maybe like a 20 minute ride to the city.
Berus was very helpful to us when we missed our train and arrived late, and he arranged for his neighbour to give us the keys which was very nice! I never got to meet him but would still happily recommend his apartment to anyone.