The flat is just like in the pictures, if not better. It is small but very cosy, well equipped and with a smart use of space. It was four of us staying there and we had no space issues at all.
Irina and her husband, Haran, were very nice and helpful to us.
The flat is just next to a bus stop that connects you to the city center and most of the attractions very easily. There is a supermarket next to the flat, too.
It is a quiet area, perfect to rest after exploring Oslo. 10/10 would recommend.