Very nice place in the heart of Gamla Stan, about 2 minutes away walking from the subway/bus station and 10mins by public transport to the heart of stockholm. Would very much recommend this place due to its fantastic location and quite modern furniture - the bedroom and kitchen are seperated which is also nice and there is a great tv. Only keep in mind that there is no desk or table in the appartment, which is a bit inconvenient if you want to eat or work.
However, I would still very much recommend it, especially if you're looking to mostly explore Stockholm - the small size won't bother you then.
Do keep in mind there is no lift and a curved stair which is complicated with heavy/big luggage.