I would recommend staying at Geoff's airbnb for anyone staying in Oslo for a few days! It was clean, quiet and secure, exactly as described. There are bars and restaurants on the street and a tram stop to get into the centre 2 minutes walk away. The Grunerlokke neighbourhood is a 5 minute walk, with great cafes, bakeries and trendy shops.
Geoff was great and very helpful. Thank you for a great stay!