I am Norwegian but I know that a lot of people visit Norway who don't speak the language so I'll keep it in English :)
I had the pleasure of staying in Oslo from the 25th to the 27. We booked the apartment only a few days before so we were a bit apprehensive since we didn't have enough time getting to know the host. Alexandra was so incredibly forthcoming and helpful with anything we asked and she made sure we knew what buss to take or anyplace we wanted to go too. The apartment was so cozy with a lot of space and it had all of the things most hotels lack. I highly recommend staying here :)