We'd have a real good time in Olga's apartment. The flat was clean, well equipped and perfectly situated for us with a lot of coffees, bars, restaurants and different stores in direct neighborhood. Also for doing trips in Stockholm the connections to tube, bus and so on is very good. But also a walk to old town of Stockholm doesn't take more than half an hour.
Sergio did welcome us very friendly and give us good instructions and tips. So we can really recommend to be in Olga's apartment during a Stockholm trip.
Lorenz