The location of the apartment is perfect - there are many attractions you can get to with just a few minutes walk - Vasa Museum (as well as many other museums), Skansen and Gröna Lund. It's also well communicated with other interesting parts of the city - you can take a tram, bus or even a ferry. Despite many attractions in the neighborhood, it gets calm and quiet at night.
The apartment itself is very nice - quite spacious, bright and equipped with all the necessary stuff.
Last but not least, Hedvig and Clara are wonderful hosts and the communication was great.