Our short stay in Stockholm was very enjoyable. Niklas's apartment was exactly as stated on the website, and is centrally located in the Old Town. The apartment is located up three flights of steps [good for the thighs], and has everything one needs, its clean, comfortable and spacious [although as Brits we missed a kettle for our tea] . We only had an issue with the apartment electronic door lock whilst we were there, but Niklas quickly sorted out the problem. Their local guide has helpful/useful information for things to do/visit, and for places to eat.
I would recommend the following things to visit/do, The ABBA Museum, The Vasa Museum, Ostermalm Food Hall, and the Winter Sightseeing Cruise.
Aifur Viking Restaurant [close to apartment]
Asian Post Office - Asian fusion food
Pelikan Restaurant - Swedish food
Grodan - Swedish breakfast
Pharmarium Cocktail Bar [close to apartment]