Just to be clear : I spend only one night at Mona's home, but I would truly remember it.
First her house is perfectly located in Oslo if you want to visit the city, very close to the train station and you basically walk by the Norwegian Royal Palace !
The room is really comfy, everything you need to have a good stay.

And Mona is really welcoming, kind and warm. So, grab a tea and enjoy a good chat with a remarquable lady. As I'm sure, you'll feel like home.

I recommend it ! :)