My girlfriend and I stayed at Katja's place for about a week. We did not get a chance to meet Katja, but our stay was very comfortable indeed. The communication with Katja was excellent throughout. The apartment is located in a very nice neighbourhood, well connected by tram+metro (2 min walk) or citybikes (nextdoor) to various parts of Stockholm. We enjoyed exploring Stockholm using the city bikes, and can highly recommend this. We also sampled some of Stockholm's waters (swimming outdoors), starting out with some tips from Katja. Closest swimming spot is a small lake a short walk (2mins) away. The apartment itself felt like home, which is exactly the way we like it. For those who prefer cooking at home, the supermarket is also around the corner (2 min walk, yet again). We highly recommend staying at Katja's place for both short and long stays.