Hege's place is in a lovely neighborhood up the hill from downtown Oslo. It's a 15 min bus ride to Central Station and I never waited more that 10 mins for a bus.
The room is comfortable. The view from the front is lovely. The metro is a 10 minute walk and will take you to the Museums and other points of interest.
The Netpresso machine gets you caffeine in the morning. Hege is very accommodating and helpful. I'd stay again.