Clean , warm , quiet and well located. A great space for a short stay for 2 people. Well provisioned supermarket right at entrance to apartment building is a bonus.
Apartment is quite small and I think that 4 people would be a bit of a stretch for more than one night.
Very close to Oslo S main train station - no more than 10 minute walk and mostly under cover : From main train departure / arrival level follow signs to Oslo bus terminal, through automatic exit doors take the small footbridge to the right and enter Galleri Oslo which is covered over. Walk the full length of Galleri crossing the entrance to the bus terminal ( down and up the travelator in the middle ) Exit at end and take steps down to the right - main road you will see is Schweigaards gate . Turn left at the corner and Platous gate is next left. You will see supermarket Rema1000 a short distance on left side.