We've just returned from 3 nights in Oslo. The facilities were good and the room was cosy. We felt very comfortable after a busy day exploring the city. The location was great with easy bus links to the centre and we often walked back (1.4 miles). It's close to some lovely parks and weekend markets.
The negatives...
The towels and bed linen were old. I would recommend taking your own towels.
The bedroom and living room/kitchen are part of Trude's house with the bathroom and hall separating the two living spaces. There isn't a lock on the guest area so when out during the day the room is unlocked. Also on Saturday night the main house had a party which went on until around 1:30am. After a busy day and early start it wasn't ideal. I would have thought that the host would list the guest house as unavailable knowing this. The house in general is very noisy. The guest bedroom is directly below the main house bathroom.
All in all a pleasant stay, but felt let down by the party - and we weren't invited! We didn't meet Trude and therefore it felt a little awkward being there. We didn't feel welcome.