We enjoyed our stay in Oslo.
Check-in time was 3pm. We could have delivered our luggage earlier but opted to use the baggage lockers at central train station.
Mark welcomed us on arrival and he was very helpful.
The house is extremely well located, with a supermarket almost next door (we did our own cooking) and a bus stop very near. There was a bus every few minutes (37 or 54) that took 15 minutes to central train station. Although close to amenities and in a built up area the house was very quiet enabling good sleep in a very comfortable bed.
There were a few minor negatives from our perspective (would have liked reading lights and somewhere to hang clothes) , but overall we were very comfortable and would recommend this accommodation