Ole Peter's room is very good value for a central location in Oslo, with lots of green space around. If you go to the Architecture Museum, you can read all about Norwegian housing developments and see this neighbourhood mentioned, for the apartments where Ole Peter's place is and for the allotment gardens down the hill just before the river. It's a quick walk to the city centre and a quick walk in any other direction to interesting neighbourhoods, like the Vulkan development with a market and many restaurants and sports spaces. Finding the bus lines 34 and 54 over and down the hill towards the river, and 37 on the other side of the cemetery is a help when you have too much to carry and can come from the central train station instead of National Theatre. It's a terrific location from which to explore the city.