The stay at Olav and Eva apartment was great! The shared spaces are really nice, including a bright living room and a fully-furnished kitchen. The room where we slept was pretty small but the bed is large and comfortable. The apartment is not located in the city centre but it is very well connected to it, being very close to a metro station (with a shopping centre as well). If you like hiking, there are also some very nice options, such as some tracks to the beautiful Lutvannet lake.
Olav and Eva are so lovely and kind, they were very friendly and open to conversation but also respectful of our spaces. Eva was so kind during the check in and also gave us some useful recommendations on what to see in Oslo. Olav was also a great host: he even helped us in cooking some norwegian kjøttkaker, who could ask for more? Bottom line: our experience was great and we totally recommend this apartment!