Kumiko's place is stylish, comfortable and very user friendly. It is conveniently situated in Majorstuen,a short walk from Vigeland Park and 4 stops from central station. Kumiko is pleasant, chatty and very hospitable. She's a qualified Oslo guide, so a great resource. I took a bus from the airport to Majorstuen, but next time I'll take the local train to National Theatre and use the same ticket (valid for 2.5 hours) to continue with TBane to Majorstuen.