My boyfriend and I were in Stockholm for a weekend trip and stayed at Ulrika's apartment for two nights. The communication with Ulrika went smoothely. She was not in Stockholm during this weekend, but answered all our questions and explained directions and check in/ out procedures very well (we picked up the key at the airport when we arrived, and had to pay 50 SEK for this, which was fine).
The apartment was very clean and so charming- looks ever better than in the photos! The windows of the apartment face a main road, but we were not really bothered by any noise.
The location was perfect, with a short walk to both public transportation and the centre of Södermalm. Would definitely recommend it!