Sofi's place is in an excellent, central location for Stockholm. Easy to walk to any other part of the city, plus Gamla Stan itself is wonderful to wake up in. We found ourselves at multiple restaurants meters/feet from the spot and the bar downstairs was very convenient (and friendly) for a night cap. It's a great studio that fits two very comfortably.
Check-in was easy and efficient and Sofi was very accommodating for my brother who had to stay an extra day after me and needed a place quick.