Lennart is a kind and thoughtful host with a contagious laugh! His place is spotlessly clean, and it is very easy to feel at home there (he actively makes sure that you feel at home, and feel comfortable using the kitchen etc too). We spent quite a few evenings staying up late, swapping travel stories, and I can wholeheartedly recommend him as a host, especially as a solo traveller, as you'll find yourself in good company.
The walk to the subway station takes 5 minutes, perhaps less if you're not 160cm tall like me. The area is safe, and pretty, and you're in the city center by subway in 15mins.