Had a fabulous 4 night stay at Malin's Airbnb. It has everything you need for a comfortable stay & Malin is a great host.
Although it is slightly out of the city centre public transport connections are brilliant, there is even a number 32 night bus which we caught at 2am after a night out in the city.
There is occasional noise from the accommodation upstairs & from the road which is busy in the mornings but nothing to spoil a stay.
There is a small supermarket up the hill & to the left, but if you get off the bus from the city at CC Vest bus stop there is a huge Meny supermarket in the Mall where you can get everything for your stay & then just catch the next bus home.
Loved Oslo & highly recommend Malin's Airbnb.