I'm 18 and I travelled with my boyfriend and we had a great stay in Stockholm thanks to Lidya !
As for the location of the house, it is in Hokarangen, 15min away from the city center by metro, and the metro station is literally 2 minutes away, so it's great ! There is also a very cheap supermarket down the street so everything you need to survive !
The room is very large with a comfortable bed and we have access to the living room and the kitchen at any time. The bathroom was quite little but has a bathtub so it's very nice.
As for Lidya herself, she is lovely and welcoming, she picked us at the metro station to show us the way to her home ! She is very discreet and let us a lot of private space, but also generous (she gave us some food) and she gives greats advices (about where to go out...).
The only negative point would be her kids who were here (I understood they're not most of times) and being loud sometimes, but it was quite rare and didn't really bother us.
Anyway, it was our first experience with airb&b and we didn't regret it, it was ideal for our budget and the journey we made.