If you're looking for a central location and a super-friendly host who genuinely and sincerely enjoys meeting new people, you've found your spot.
Jonas is an amazing host. He was very communicative, and went out of his way to make our stay amazing. He gave us a lot of great suggestions for restaurants/bars/museums and he even brought some bread for breakfast that was only sold on Fridays from a bakery he loved, bringing a local taste into the apartment. We spent a couple hours chatting with Jonas about design and Sweden, and all in all thought staying with him was super.
His place is very centrally located and we walked the whole time we were there (except when we took a half-day trip out to Drottningholms Slott). The SoFo area and Gamla Stan are not far, and a great overlook of the city is just around the corner.