Leon is a really nice guy and a great host, the flat was perfect and had everything I needed to relax and regenerate after exploring Stockholm by foot. :) It's about a 25 minute walk from the old town (Gamla Stan) or two stops by metro, the metro station Mariatorget is about a 5 minute walk from the flat. The location is great, adjacent to Hornsgatan, a main street with lots of shops and restaurants but two streets up so it's quiet and peaceful. Behind the flat is a promenade that stretches along the north slope of Södermalm island that offers great views of the city especially at night. Can highly recommend staying here!