My 12-year old daughter and I loved staying at Frida's place for three days (4 nights)! It's small but has got everything you need. It was clean and tidy. We tried sleeping in the small bed together, but we didn't like it, so we used the extra mattress. Good wifi.
Also the neighborhood is very nice, surrounded by water and a little park. It's about 10 minutes walk from the T-bana (metro) and busstop. There are a few nice bars, restaurants and shops nearby. It takes less then 5 minutes by metro to get to Gamlastan and one station further to Central Station.
We didn't meet Frida, but kept in touch by phone and sms. She left us a few flyers about things to see and do in Stockholm.