Stay here for Martin's great hospitality (they let me check in and check out at my convenience and provided tips and maps of local whereabouts) and the great location (fewer than 5 mins walk to Gronland metro, and maybe 10 to the bus terminal?). If you are coming from the Oslo airport, the FB2 bus stops at the nearby Hausmann Bru stop and you can just walk ~7 mins to their place. Awesome.