We enjoyed our stay at Katia and Tom's. The location is absolutely ideal for exploring Stockholm on foot, and it's lovely to have the charm of Gamla Stan right outside the door. Our only nitpicks that may or may not matter to you have to do with the use of the sofa bed in the living room – it's quite old and creaky and probably not so great for more than a couple of nights. The living room can also be quite noisy, so bring earplugs if you're using it for sleeping. Otherwise the flat is tidy and well equipped and our group of three had a great time there.