We stayed at Morton's place for two nights. the communication and check-in was uncomplicated, i did not see him in person.
the little flat is very romantic and its perfect for two persons. also the area is great and calm with a nice view, approx. 12 min walking distance to the bus that drives you into the center of Oslo.
Make sure that you know when the bus drives, because its not too often :)
two things we didnt like:
As already mentioned will the bathroom get completely wet after showering (and wont dry until the next day)
if you want to cook make sure to have your own dish drying sheets with you and clean the pan/pot before using it!