Annika's studio is great! Firstly,
it's well located, you can reach everything by foot and enjoy scenic routes. (Plus, just down the road is the best ice cream parlour in Stockholm!)
Secondly, the apartment itself has all you need for a couple of days and you won't need to turn on the light since the many windows allow it being naturally lit. Annika was there when I arrived and explained everything to me. She's got plenty of maps in the apartment and was happy to point out good places for swimming etc.
I greatly enjoyed my stay and will try to stay at Annika's when I come back to Stockholm!