Martin's apartment is right next to the Tbana, and right near everything you could need for a comfortable stay. Martin was extremely nice and accommodating even when I had to check in a few days late and he and his daughter are both thoughtful and polite hosts. If you are staying in Stockholm and would like to be able to get around the city easily, I highly recommend staying at Martin's. I had a wonderful month there and if I am back in Södermalm I will certainly book again.