Hans's place is fantastic. A walk to Sagene from Oslo center will put you back about a half hour, but it takes you through café-rich Grünerølkka and up the rushing river and past waterfalls. If you like hiking this great town, you can head the other way and follow the river up into the woods. It's a great place to see the city and the great nature of Oslo. And public transportation is only a couple of minutes away if that's your thing. Views over the city from the living room, and the bed is very comfortable and the apartment is very clean in general.