We had a wonderful stay in Oslo. Prior to arrival, Markus was very informative, and there was no problem leaving the luggage earlier than the official check-in.
Upon arrival there was a information sheet in the kitchen listing all the neccessary information for a great stay.
The apartment was very cosy and had everything we needed, this included a large couch for relaxation after a long walk in cold Oslo.
I would recommend Markus and his apartment.