We really liked our stay in Linas beautiful apartment in Södermalm. It is very clean, all you need is provided and our kids loved to use the"swingers" on the ceiling and the other toys. It is a footwalk away from Gamla Stan, altough I recommend exploring the sourounding area of Södermalm. There are a couples of nice restaurants gathered around the park, cool little non-touristy stores and "Fjällgatan View Pont" is only a short walk away too. From there you have a perfect view over Stockholm. So if you are looking for a beautiful apartment in a hip area, but still close to the City Center and Gamla Stan we highly recommend staying at Lina place.