We had a great time at Arne's place. He was very accomodating with the check in/out and overall was very relaxed. It was great to meet him and he made us feel right at home straight away.
Arne is happy for you to use his kitchen which is great when staying in Oslo as the restaurants can be a bit pricey!
The flat is lovely and is in a good location - really quick to get to the city by public transport (just over 5 minutes by tram/bus) and you can also walk to the centre in not too long. Arne recommended a great walk for us into the city which was really beautiful.
Overall we had a great stay and would definitely recommend staying in Arne's flat when visiting Oslo :)