Andreas is a wonderful host and has the most beautiful flat I've ever visited! We unfortunately didn't get to meet Andreas but he was super helpful instructing us how to check-in and give tips on how everything worked in the flat.
The flat is incredible as I mentioned and very tempting to spend your whole time there rather than exploring Stockholm! But you should explore the city and Andreas's flat is perfect for wandering Sodermalm or heading further into Gamla stan and the centre.
Definitely, 200% recommend!