I stayed in this beautiful appartment for the weekend with my boyfriend. We really enjoyed our stay. The location of the appartment is just perfect. The appartment is in Gamla Stan, the old city of Stockholm. The metro station is very nearby (250 meters). There are plenty of lovely restaurants and café's nearby the appartment. Sofi was very flexibel with the check in time. She sent us information about the appartment before our stay (entering the building, how to travel from airport to the appartment, supermarket and wifi etc). We did had a little problem with entering the building.
However this did not ruin our stay. I would recommend this appartment and would gladly go back one day.