Mauro is an immensely hospitable, helpful, and well-read person. The apartment and room have a hygge feel and all the essentials you might need. Thanks to the perfect location, you probably won't be using public transport often. And if you are new to the city, then Mauro's travel guide will provide you with the city's hidden gems.
If you are coming to Oslo, I by all means recommend you to stay at Mauro's place.