I stay in Petra's lovely Appartement for 5 Days and it was a very good time.
It's a cute small flat with an entrance and kitchen in one room, a very small bathroom and a dining / living room with a bed on an additional level.
The flat ist about half an hours walk from Gamla Stan and near Mariabergen, the central of SoFo.
You've hot a supermarket in the same building and also an CIA or an Lidl nearby.
Petra is a very friendly and courteous host and you can always contact her if you have any questions or tips.